Showing posts with label Climate change. Show all posts
Showing posts with label Climate change. Show all posts

Wednesday, July 2, 2025

Exploring the frontiers of data science

Satellite technology is transforming the field of geography, says Xiao Huang. "It's kind of like being an astronaut in that satellites give you a view of Earth from space."

As a high-tech geographer, Xiao Huang uses remove sensing and AI for insights into how to design more equitable cities, improve management of natural resources, lessen the impact of natural and human-caused disasters, and improve public health policies.

"I love geography and computer technology," says Huang, assistant professor in Emory's Department of Environmental Sciences. "I want to use my knowledge of these fields to help humanity, especially socially disadvantaged communities."

Read the full story here.

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Developing a new approach to control a dangerous urban mosquito in Ethiopia

Friday, December 13, 2024

High temperatures dampen immune systems of wild capuchins

A capuchin mother carries a baby on her back. The study found that the immune systems of juveniles were most impacted by high temperatures. (Capuchins de Taboga)

High temperatures lower the immune performance of wild capuchin monkeys in Costa Rica, especially in young individuals, finds a new study published by Science Advances. The work, led by scientists at Emory University and the University of Michigan, provides some of the first data on the relationship between the immune system and ambient temperature in a wild mammal. 

“Capuchin monkeys are super intelligent, highly adaptive primates that do well in diverse ecosystems,” says Marcela Benítez, Emory assistant professor of anthropology and co-senior author of the paper. “The fact that we’re seeing their immune responses affected by high temperatures suggests that many mammalian species that are less adaptive may be experiencing even worse effects as average temperatures warm globally.” 


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Wednesday, September 11, 2024

Large theropods thrived near South Pole, Australian tracks show

Melissa Lowery and Anthony Martin, co-authors of the new paper, examine a theropod track.

A discovery of dinosaur tracks on Australia’s southern coast — dating back to the Early Cretaceous when Australia was still connected to Antarctica — indicates that large theropod dinosaurs thrived in this polar environment, prowling the river floodplains when the ice thawed during the summers. 

The journal Alcheringa published the analyses of the tracks made in the Wonthaggi Formation south of Melbourne between 120 and 128 million years ago. The find includes 18 theropod tracks and four tracks made by ornithopods — small, herbivorous dinosaurs that may have been prey for the theropods. 

“These numerous tracks are the best evidence yet that these former polar environments supported large carnivores,” says Anthony Martin, first author of the study and a professor in Emory’s Department of Environmental Sciences. “The large theropods would likely have fed on prey such as smaller dinosaurs, fish and turtles.” 

Theropods, from the ancient Greek for “wild beast foot,” are a dinosaur clade characterized by walking on two legs and feet with three clawed toes. They belong to the same evolutionary group as Allosaurus, Tyrannosaurus rex and Velociraptor. 

The largest track from the current find was 18.5 inches long. “The hip height of that theropod would have been about the same as the full height of a tall, modern-day human — or a bit more than six feet tall,” Martin says.

Read the full story here.

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Birds set foot near South Pole in Early Cretaceous, Australian tracks show

Paleontologist eyes Earth's excavators, from microbes to elephants and dinosaurs

Tuesday, September 10, 2024

The promise and pitfalls of 'climatopias' for building resilience in coastal communities

"We need to invest in projects for low-income groups because they are the most impacted by climate change," says Jola Ajibade, associate professor in Emory's Department of Environmental Sciences. (Photo by Carol Clark)

By Carol Clark

Idowu (Jola) Ajibade grew up in Lagos, Nigeria, a low-lying city built around a lagoon bordered by the Atlantic Ocean. Flooding is a routine occurrence during the rainy season. 

“It was bad,” Ajibade recalls of living on the ground floor of a building during her early childhood. “We would get inundated with water until my family relocated to the upper level in a rental apartment. I don’t have many childhood photos or videos like most people. Our belongings got flooded out yearly — we replaced some items, but some things are just irreplaceable.” 

These experiences are part of what drove Ajibade, associate professor in Emory’s Department of Environmental Sciences, to become an environmental and human geographer. She explores how climate change is transforming the lives, livelihoods, social-cultural landscapes and housing access for low-income groups and historically marginalized communities. 

Nature recently published a commentary by Ajibade and Sameer Shah from the University of Washington considering whether futuristic settlements on water, so-called “climatopias,” are viable ways to build resilience in coastal communities. 

As urban populations boom, even as climate change exacerbates flood risks in coastal areas, governments are working with developers, architects and engineers to try to make their cities more resilient. Many leaders are promoting showcase climatopias as viable solutions. 

Ajibade and Shah, however, take a more cautious approach in their Nature commentary. “Ultimately, climatopias can become technical solutions to a complex global challenge only if stricter planning processes, impact assessments, ecosystem protection and justice for communities are at the heart of any coastal future,” the authors write. 

Examples of climatopias

The Maldives Floating City is a development of modular floating platforms taking shape in the Indian Ocean, set for completion in 2027. The development aims to help the Maldives, one of the world’s low-lying nations, survive the effects of rising sea levels. 

Maasbommel in the Netherlands offers an example of an amphibious climatopia. The 32 amphibious homes of Maasbommel are anchored to the ground but also fastened to flexible mooring posts that allow them to move upward by more than five meters and float during floods. 

Reclamation, or the practice of creating new land from oceans by filling the water with rock, cement and other materials, forms the basis for other climatopia projects worldwide. One famous example is Eko Atlantic, an enclave of sleek, modern skyscrapers rising on a two-square-mile platform of reclaimed land on the Lagos waterfront. 

Dredging for Eko Atlantic began in 2009, and construction is still underway. When completed, Eko Atlantic will comprise offices and luxury condos expected to house 250,000 residents, who will be protected from storm surges by an eight-mile-long, 20-foot-tall wall of concrete and granite. 

Developers laud Eko Atlantic as a way to attract transnational investment, drive economic growth, combat the effects of climate change and house more people in one of the world’s fastest-growing megacities. 

Getting multiple perspectives 

While working on her PhD as a graduate student at Western University in Canada in 2012, Ajibade returned to her hometown to research community vulnerability and resilience in Lagos, a city sharply divided between the rich and poor. 

“I talked to people who lived in slums and those in wealthy areas to get both their perspectives,” she says. “There was torrential rainfall during my visit and, at one point, I had to wade through chest-high water.” 

She notes that construction on the Eko Atlantic project has been blamed for displacing some communities and for diverting water in ways that increase the flooding burden on the poorest of the poor. Others counter that poor communities have caused the increase in flooding by building shanties on drainage systems and filling them with trash. 

Some believe that Eko Atlantic will benefit low-income people by providing service jobs. Others doubt that the economic boon of the pricy new real estate will “trickle down” in ways that benefit those who need it most. 

So is Eko Atlantic worth the billions of dollars that have already been invested in it during the past 16 years? 

“It depends on who you ask,” Ajibade says. 

Improving the drainage infrastructure throughout Lagos, including in the poorest areas, might be another solution that could benefit more people. 

“We need to invest in projects for low-income groups because they are the most impacted by climate change,” she notes. “Climatopias can’t be the focal solution, and they should be carefully considered so that they don’t damage fragile ecosystems, accelerate ocean colonialism or create even more problems for people who are already living on the margins of society.”

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Monday, July 29, 2024

How cows expanded a neuroscientist's mind

"Cows are emotional, intelligent and loyally affectionate," says Gregory Berns, Emory professor of psychology.

During the COVID-19 pandemic, Emory neuroscientist Gregory Berns moved with his wife to a farm about an hour south of Atlanta. His reinvention, from city dweller to farmer, led to Berns’ upcoming book, “Cowpuppy: An Unexpected Friendship and a Scientist’s Journey into the Secret World of Cows.” Set for publication by Harper Horizon on Aug. 20, the book describes Berns’ crash course in becoming a cattleman and his ongoing fascination with the interior world of cows. 

“I originally got cows for biological help, to keep the grass down,” Berns explains. “But then my relationship with them turned into something more. I started seeing the world through a cow’s eyes. There’s a common misconception that cows are dumb animals, but that’s just because most people haven’t had the opportunity to interact with them. I decided it was time to set the record straight on cow brains.”

His new lifestyle also inspired Berns to develop an undergraduate class to debut this fall: “Psychology of Sustainability.” 


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Wednesday, July 24, 2024

White House taps Emory expert to speak on climate resilience panel

“The climate is changing. We also need to think about ways to change ourselves as a society so we can begin to meet the important challenges ahead of us,” says Idowu (Jola) Ajibade, associate professor in Emory University’s Department of Environmental Sciences. 

As a deadly heat waves blanketed parts of the United States, Ajibade spoke on a guest panel of experts for a meeting of the U.S. President’s Council of Advisors on Science and Technology (PCAST). PCAST consists of experts from who advise the president on policy matters where the understanding of science, technology and innovation is key. 

The public meeting, entitled “Social Impact of Research: Climate Resilience,” was livestreamed on July 11 and also recorded. 

Ajibade is an environmental and human geographer. She explores how climate change is transforming the lives, livelihoods, social-cultural landscapes and housing access for members of historically marginalized communities. 

“If we’re going to build resilience to climate change, we need multiple perspectives, multiple expertise and, certainly multiple methods,” Ajibade explains during her PCAST presentation. 

Watch the full presentation in the video above.

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Wednesday, May 15, 2024

Rabies outbreaks in Costa Rica cattle linked to deforestation

Cows in a forest of the Alajuela province of Costa Rica meander near the entrance to a cave where researchers are gathering data on vampire bats and the ecology of the rabies virus. Photo by Amanda Vicente.

By Carol Clark

Deforestation in Costa Rica raises the risk of cattle becoming infected with rabies by vampire bats, finds a new study. Emerging Infectious Diseases published the research by disease ecologists at Emory University. 

“A healthy tropical forest has phenomenal diversity — not just among plants and mammals like monkeys and bats, but also among microorganisms,” says Thomas Gillespie, Emory professor and chair of the Department of Environmental Sciences and senior author of the study. “When you destroy parts of a forest, the diversity goes down and the dynamics of disease transmission may change in a way that leads to the emergence of new pathogens or the reemergence of existing ones.” 

The Costa Rica economy relies heavily on ecotourism. Approximately 25% of its territory is protected under its National System of Conservation Areas, the largest percentage of protected areas accounted for by any country in the world, according to the Global Alliance of National Parks. 

Agriculture, however, is also an important economic sector and often encroaches into unprotected tropical forest areas. Livestock farms cover about 38% of the country’s territory, according to the United Nations Environment Program. 

“The government has done an amazing job of protecting much of its tropical forest,” Gillespie says. “In some areas, however, the country has high rates of deforestation due to clearing of the land for agricultural uses. It’s a big dichotomy.” 

Rabies is a viral disease most often transmitted by the bite of a rabid mammal. Vaccination campaigns have been largely effective at preventing rabies outbreaks in dogs in Costa Rica. The virus, though, keeps reemerging in cattle, spread by vampire bats. 

A vampire bat is held in a researcher's gloved hands. The bat's razor-sharp teeth allow it to make an incision in an animal without the animal feeling it. Photo by Neto Villalobos.

Found in tropical and subtropical areas of Central and South America, vampire bats feed solely on blood. Unlike other bats, they can walk — and even run — on land. They feed at night, stealthily approaching a sleeping mammal. Razor-sharp teeth and surgical precision allow the bats to make an incision in an animal, such as in the hock of a cow, without the animal feeling it. An anticoagulant in vampire bat saliva keeps the blood flowing as the bat laps up a meal. 

The researchers wanted to better understand the factors associated with rabies outbreaks in cattle in Costa Rica. They drew from data of the National Animal Health Service of Costa Rica to map the time and locations of rabies outbreaks in cattle from 1985 to 2020 in both northern and southern regions of the country where tropical forest has been cleared for agriculture. 

They also mapped land-use data across the same time for the outbreak sites, including a radius of 10 kilometers for each site, the maximum foraging range for vampire bats. They then used geographic information system software to generate spatial probability estimations based on these known outbreaks. 

The results showed a link between the location of forest habitat and an outbreak. Each one-kilometer increase in distance from forest increased the probability of an outbreak by 4%. The researchers theorize that decreased availability of bat-roosting sites within forested habitat appears to increase the preference of vampire bats to feed on cattle, as opposed to wild mammals. 

“We found the highest probability of rabies outbreaks in Puntarenas Province in the south, indicating the need for localized, preventative interventions in that region to avoid rabies reemergence in people,” says Julie Clennon, an eco-epidemiologist in Emory’s Department of Environmental Sciences and co-author of the study. 

A forest in Alajuela province with cleared patches of land due to agricultural activity. Photo by Amanda Vicente.

A growing number of studies show a similar pattern linking the destruction of tropical forests with disease reemergence, Gillespie says, including a reemergence of hanta viruses in the Amazon associated with soybean production and the reemergence of the Lassa virus in West Africa, linked to oil-palm production. 

In a previous study, the researchers and colleagues showed that shifts in the feeding preferences of vampire bats due to human land-use changes in Costa Rica altered the gut microbial communities and immune systems of the bats. Such shifts could potentially make bats more susceptible to pathogens and more likely to spread them. 

“When governments make decisions about large-scale land-use changes, they need to consider the potential of disease emergence, or reemergence, along with the potential for increased greenhouse-gas emissions,” Gillespie says. 

In addition to their association with the destruction of natural habitat, cows and other ruminant animals emit methane, a potent greenhouse gas, as they digest grasses. And the greenhouse gas nitrous oxide is emitted from the manure of ruminants. 

“As an individual, you may want to reduce beef in your diet as much as possible,” Gillespie says, “both to improve your own health and that of the planet. We are currently using natural resources at a rate that’s not sustainable.” 

First author of the current paper is Christie Jones, who did the work as a student in Emory’s 4+1 BS/MPH program, where she received a bachelors in environmental sciences before entering an accelerated program for a master of public health at Rollins School of Public Health. Jones is currently studying medicine at the American University of the Caribbean. Amanda Vicente, a former Emory postdoctoral fellow in the Gillespie lab who is now at the University of Oklahoma, is a co-author. 

The work was funded by Emory University’s Halle Institute for Global Research, the Department of Environmental Sciences and the Fox Center for Humanistic Inquiry, and the Fulbright Association.

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Tuesday, April 9, 2024

Tracking ticks in Georgia to help monitor emerging diseases

Mapping the lone star tick is another step in a comprehensive Emory project to track and monitor the array of tick species in Georgia and the diseases that they can spread — including those caused by emerging pathogens.

By Carol Clark 

The most common tick found on humans in Georgia is the lone star tick — an aggressive seeker of blood that can spread dangerous pathogens through its bites. 

Emory University researchers combined field data with spatial-analysis techniques to map the distribution of the lone star tick across the state. The journal Parasites & Vectors published the research, which identifies specific environmental conditions associated with this tick species, Amblyomma americanum, in Georgia. 

The areas with the highest probability for the presence of lone star ticks include parts of the Southeastern Plains and Piedmont ecoregions of the state, including metro Atlanta. 

“We found that these regions contain sweet spots for the lone star tick,” says Stephanie Bellman, first author of the study and an MD/PhD student in Emory’s School of Medicine and Rollins School of Public Health. “They tend to be more prevalent in forested areas of mid-elevation — not too high or too low — and in soils that retain moisture but are not swampy.” 

The study maps the distribution at the scale of one square kilometer. That resolution is far finer than the currently available information, which is limited to the county level and does not encompass the state. 

“As the weather warms and people start getting into the outdoors more, we hope our data can be used to target areas for tick-bite prevention messaging,” says Gonzalo Vazquez-Prokopec, professor in Emory’s Department of Environmental Sciences and senior author of the study. 

Vazquez-Prokopec is a leading expert in vector-borne diseases — infections transmitted among humans and animals by the bite of a living organism, such as a tick or a mosquito. 

Diseases the lone star tick is known to transmit include ehrlichiosis, southern tick-associated rash illness (STARI) and Heartland virus disease — which was first identified in the United States in 2009. The bite of the lone star tick is also associated with a potentially life-threatening allergy to red meat and dairy products known as alpha-gal syndrome. 

First author Steph Bellman, far right, in the field last summer with fellow Emory students and co-authors, from left, Josie Pilchik, Isabella Roeske, Ellie Fausett and Audrey Long.

Mapping the lone star tick is another step in a comprehensive Emory project to track and monitor the array of tick species in Georgia and the diseases that they can spread — including those caused by emerging pathogens. 

Tickborne diseases are on the rise, far surpassing the incidence of diseases spread by mosquitos in the United States. While Lyme disease is the most common, the Centers for Disease Control and Prevention (CDC) currently recognizes 18 tickborne diseases in the country. 

“We need to educate people that the environment that they grew up in is likely very different in terms of the number and types of ticks and the pathogens that they are carrying,” Vazquez-Prokopec says. 

Anne Piantadosi, assistant professor in Emory School of Medicine’s Department of Pathology and Laboratory Medicine, is co-author of the study. Co-authors also include five Emory students who conducted fieldwork: Ellie Fausett (who has since graduated with a joint environmental sciences/MPH degree); Leah Aeschleman and Audrey Long (who have since received master’s of public health degrees from Rollins School of Public Health); Josie Pilchik, (who graduated with a bachelor’s in biology) and Isabella Roeske (an Emory senior majoring in environmental sciences). 

Climate change is fueling warmer and shorter winters, increasing opportunities for some species of ticks to breed more frequently and expand their ranges. Land-use changes are also strongly associated with tickborne diseases, as more human habitats encroach on wooded areas and the loss of natural habitat forces wildlife to live in denser populations. 

“Georgia is a tick haven in general,” Bellman says, “since we have a long warm season and such a diversity of habitats.” 

An aggressive biter

The researchers decided to focus first on mapping the distribution of the lone star tick because it is the dominant tick species in Georgia and can spread an array of pathogens. In 2019, the Emory researchers found that Heartland virus is circulating in lone star ticks in Georgia, an emerging pathogen that is not well understood. 
The lone star tick (CDC)

Named for a bright, yellowish-white spot on its back, the lone star tick is widely distributed in wooded areas across the Southeast, Eastern and Midwest United States. It is tiny —in the nymph stage it is about the size of a sesame seed and as an adult it is barely a quarter-of-an-inch in diameter as an adult.

Despite its tiny size, the lone star tick is aggressive in its quest for blood meals. “They can sense carbon dioxide from your exhaled breath and the vibrations from your movement in a forest,” Bellman says. “They climb up onto vegetation and reach out their legs to grab onto you as you pass by.” 

For the current study, Bellman led crews of Emory students, known as “the tick team,” in field surveys. They used “flagging” as a tick-collection technique. A white flannel cloth attached to a pole is swished in a figure-eight motion through the underbrush. Tweezers are used to transfer any ticks found on the flannel into a vial. 

Tick team members surveyed 198 locations at 43 state parks and wildlife management areas across the state, from March to July 2022. Analyses combined the site-sampling data with environmental variables — including type of vegetation, land use, climate, elevation and other factors — characteristic for six different ecoregions of Georgia. 

Lone star ticks were found in all of the ecoregions except for the mountainous Blue Ridge ecoregion in the northeast corner of the state. The majority of the ticks were found in forested areas of the Piedmont, Southeastern Plains and Southern Coastal Plains ecoregions. 

The researchers encourage people to follow the recommendations of the CDC for preventing tick bites. 

An array of ticks

And while the map for the lone star tick provides guidance on the likelihood of encountering the most prevalent human-biting tick in the state, there are other tick species that the researchers have yet to map. The black-legged tick (Ixodes scapularis), which can transmit the bacterium that causes Lyme disease, for instance, is also established in Georgia. Lyme disease, however, is relatively uncommon in in the state for reasons that are not yet well-understood. 

The researchers are also investigating the Asian longhorned tick (Haemaphysalis longicornis) in Georgia. Long established in China, Japan, Russia and parts of the Pacific, the Asian longhorned tick was first detected in the United States in 2017, in New Jersey, and has since spread to 19 states. It was found on farm animals in Pickens County, Georgia in 2021. 

The Asian longhorned tick (CDC)
The Asian longhorned tick reproduces asexually and a single female can generate as many as 100,000 eggs, rapidly producing massive amounts of offspring that feed on livestock. So many ticks can be covering a single sheep or cow that the loss of blood physically weakens or, in extreme cases, kills the animal. 

While it is often associated with livestock, the Emory research team recently found Asian longhorned ticks in the Buck Shoals Wildlife Management Area in White County, Georgia. 

The Asian longhorned tick carries bacterial and viral pathogens that can infect humans, including severe fever with thrombocytopenia syndrome virus (SFTSV), also known as Dabie bandavirus. Human cases of SFTS, a hemorrhagic fever, emerged in China in 2009 and have since been identified in other parts of Asia, although not in the United States. 

Also of concern is the fact that the Heartland virus shares genomic similarities with SFTS, which suggests the Asian longhorn tick could potentially transmit this emerging pathogen. The Emory team has been finding the Heartland virus in lone star ticks collected from central Georgia starting in 2019. They have continued to find Heartland virus in at least some of the ticks collected from that area nearly annually through 2023. (They did not perform collections in 2020 due to the COVID-19 pandemic.)

More than 60 cases of Heartland virus disease have been reported in the United States, according to the latest CDC statistics. Many of the identified cases were severe enough to require hospitalization, and a few individuals with co-morbidities have died. The actual number of people who may have been infected with Heartland virus is believed to be higher, however, since the virus is not well known and tests are rarely ordered for it. 

Complicating the issue is the fact that symptoms of Heartland virus are akin to those of many tickborne illnesses: fever, fatigue, headache, nausea, diarrhea and muscle or joint pain. 

“Human cases of Heartland virus are rare now, but we don’t know whether that could change,” Bellman says. “We need to gather more baseline data and learn how it spreads in the environment so that we have the evidence we need to potentially prevent, or limit, its spread.” 

Anne Piantadosi, assistant professor in Emory School of Medicine’s Department of Pathology and Laboratory Medicine, is co-author of the study. Co-authors also include five Emory students who conducted fieldwork: Ellie Fausett (who has since graduated with a joint environmental sciences/MPH degree); Leah Aeschleman and Audrey Long (who have since received master’s of public health degrees from Rollins School of Public Health); Josie Pilchik, (who graduated with a bachelor’s in biology) and Isabella Roeske (an Emory senior majoring in environmental sciences). 

Work on the current paper was funded by grants from the U.S. Department of Agriculture, National Institutes of Health, Emory University and the Emory MP3 Initiative and Infectious Disease Across Scales Training Program. 

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Friday, March 29, 2024

A new estimate of U.S. soil organic carbon to improve Earth system models

"To understand how soil carbon will change under a changing climate, we first need accurate estimates of current soil organic carbon levels and the key factors that influence them," says Emory environmental scientist Debjani Sihi, senior author of the study.

By Carol Clark

Soil contains about twice as much carbon as the atmosphere and plants combined. It is a major carbon sink, capable of absorbing more carbon dioxide from the atmosphere than it releases. Management of soil carbon is key in efforts to mitigate climate change, in addition to being vital to soil health and agricultural productivity. 

Measuring soil carbon, however, is a painstaking, expensive process. Samples must be dug from the ground and sent to a lab for analysis, making upscaling measurements on a large spatial scale challenging. 

Now environmental scientists have combined field-level data with machine-learning techniques to estimate soil organic carbon at the U.S. continental scale. The Journal of Geophysical Research — Biogeosciences published the new soil organic carbon estimate, which improves the overall estimate for the United States and gives new insights into the effects of environmental variables on soil organic carbon. 

“There is growing recognition that soil organic carbon is important and that we should invest in building it up through sustainable land management practices,” says Debjani Sihi, senior author of the study and assistant professor of environmental sciences at Emory University. “Our estimate is more accurate than existing estimates and provides a better benchmark to guide policymakers and land managers in adopting climate-smart practices.” 

Land is far more efficient than the ocean at retaining carbon, Sihi notes, and offers one possible nature-based solution to help mitigate climate change. “We could potentially create conditions,” she explains, “that are favorable for soil to capture carbon dioxide from the atmosphere and lock it there for a really long time — over millennia.” 

Sihi is a biogeochemist who studies environmental and sustainability issues at the nexus of soil and climate. 

First author of the current paper is Zhuonan Wang, a former postdoctoral fellow in Sihi’s lab who is now at Colorado State University. 

Digging into soil data 

Soil organic carbon is made up of plant and animal matter in various states of decomposition. While inorganic carbon is also found in the soil in the form of carbonate minerals, organic carbon is usually the largest proportion and the most important driver of soil biology and quality. 

The U.S. Department of Agriculture maintains the National Cooperative Soil Survey soil characterization database. This data was gathered over decades both by walking over the land and observing and by digging up core samples and sending them to laboratories for analysis. Measuring soil organic carbon, for example, requires digging a core to the root zone, about 30 centimeters deep to obtain a topsoil profile and until the core hits bedrock to obtain an entire soil profile. 

Soil sampling is done in other parts of the world as well. The International Soil Organic Carbon Network encompasses more than 430,000 soil profiles, drawn from across the globe. Scientists use such data to create “soil maps,” or estimates of soil characteristics in various regions. One well-known soil map is the Harmonized World Soil Database, developed by the United Nations’ Food and Agricultural Organization and collaborators. Another is SoilGrids, supported by the International Soil Reference and Information Center in the Netherlands. 

Significant inconsistencies exist in the estimates of soil organic carbon within both the Harmonized World Soil Database and SoilGrids. Sihi and her team set out to see if they could resolve these inconsistencies within the United States estimates by finding more effective ways to scale up the soil-sampling data. 

The researchers divided the United States — including all 50 states and Puerto Rico — into 20 different regions and created machine-learning models for each region. They obtained nearly 50,000 soil samples, ranging from 30 centimeters to one meter deep, from across these regions. They built their algorithms using these data samples for soil organic carbon, matched to precise geographic information system locations. 

They also drew from additional open-source data to feed their models with 36 environmental variables, including details about the climate, topographical features of the land, biogeochemical properties of the soil and the amount of vegetation on the landscape. 

A better benchmark for modeling Earth systems 

The results showed that the new method provided more accurate estimates than both the Harmonized World Soil Database and SoilGrids for the top 30 centimeters of soil, where the most biologically active soil organic carbon tends to be concentrated. 

The new method also revealed how the effects of environmental variables on soil organic carbon vary across regions. While climate was the most common predictor of soil organic carbon across most of the regions, the vegetation index tended to be more important in the arid areas of the southwest. Elevation was a key variable in regions that were mountainous or included a major river delta. 

The researchers hope that others will apply their approach to other countries and continents where enough on-the-ground data is available. 

“The beauty of our approach is that it gives us the power to identify regions with high uncertainty in our estimates and that helps us to guide future sampling efforts,” Sihi says. 

Considering environmental variables also increases the new model’s flexibility as global temperatures rise due to climate change, causing soils to warm and alter rainfall patterns. It remains unclear, Sihi notes, if soils will continue to serve as a carbon sink or transform into a carbon source. 

“To understand how soil carbon will change under a changing climate, we first need accurate estimates of current soil organic carbon levels and the key factors that influence them,” Sihi says. “Our new estimate is a step toward getting more accurate baseline data to improve Earth system models for climate change.” 

Co-authors of the new estimate include Jitendra Kumar (Oak Ridge National Laboratory), Samantha Weintraub-Leff (National Ecological Observatory Network), Katherine Todd-Brown (University of Florida) and Umakant Mishra (Sandia National Laboratories). 

The work was supported by the National Science Foundation and the U.S. Department of Energy.

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Monday, November 20, 2023

Birds set foot near South Pole in Early Cretaceous, Australian tracks show

Emory's Anthony Martin, left, at the site of the discovery with Melissa Lowery, a local volunteer fossil hunter who was the first to spot most of the tracks. (Photo by Ruth Schowalter)

The discovery of 27 avian footprints on the southern Australia coast — dating back to the Early Cretaceous when Australia was still connected to Antarctica — opens another window onto early avian evolution and possible migratory behavior. 

PLOS ONE published the discovery of some of the oldest, positively identified bird tracks in the Southern Hemisphere, dated to between 120 million and 128 million years ago. 

“Most of the bird tracks and body fossils dating as far back as the Early Cretaceous are from the Northern Hemisphere, particularly from Asia,” says Anthony Martin, first author of the study and a professor in Emory University’s Department of Environmental Sciences. “Our discovery shows that there were many birds, and a variety of them, near the South Pole about 125 million years ago.” 

Read the full story here. 

Related: 

Tell-toe toes point to oldest-known bird tracks from Australia 

Paleontologist explores a billion years of animals breaking up rocks, bones, shells and wood

Friday, November 10, 2023

NSF funds holistic approach to help farmers adapt to climate change

"There is already a lot of work on what climate change may mean for agriculture in general," says Emily Burchfield, Emory assistant professor of environmental sciences. "But what climate change means for an individual farm must be filtered through issues particular to that farm."

By Carol Clark

The National Science Foundation (NSF) awarded Emily Burchfield, Emory assistant professor of environmental sciences, $1.6 million to lead efforts to identify emerging pressures on agriculture in Georgia, Iowa and Ohio and to develop predictive models to help farmers and policymakers weather these changes. 

“In a nutshell, we’re trying to understand what climate change will mean for agriculture in these three states,” Burchfield says. “We’ll be integrating biophysical projections based on environmental data with insights gathered from farmers and agricultural experts.” 

The goal is to develop possible scenarios for the impacts of climate change — along with the evolving technical, socioeconomic and political landscapes in each state — for how and where crops could be grown over the next 30 to 40 years. The researchers will create a public, online tool to allow farmers and policymakers to explore the possible futures of agriculture at regional and state levels and to support their efforts to manage these scenarios. 

The grant is part of the NSF Dynamics of Integrated Socio-Environmental Systems Program (DISES). 

“Traditionally, the NSF has mainly split programs into the social sciences and the natural sciences but DISES is one of their newer programs that joins the two, looking at how nature affects people and people affect nature,” Burchfield says. “Coupling human and natural systems in theoretical frameworks allows us to take on some of the grand challenges that we’re facing, like climate change and food and water security.” 

Burchfield is principal investigator for the project, which also includes researchers from Arizona State University, Ohio State University and the University of Nebraska, Lincoln. 

A range of agricultural systems 

While the two main crops in both Iowa and Ohio are corn and soy, agriculture in Georgia is far more diverse. The state leads the nation in the production of peanuts, pecans, blueberries and spring onions and is also a leading producer of cotton, watermelon, peaches, cucumbers, sweet corn, bell peppers, tomatoes, cantaloupes, rye and cabbage. 

Agriculture contributes nearly $70 billion annually to Georgia’s economy and one in seven Georgians works in agriculture, forestry or related fields, according to the Georgia Farm Bureau. 

“Compared to other parts of the country, Georgia is incredibly diverse not just in terms of what is grown in the state but in terms of who grows it,” Burchfield says. “A lot of exciting changes are happening in the state — citrus production is moving into South Georgia. And the biggest organic farm east of the Mississippi is located in Georgia, producing carrots.” 

While California currently produces the bulk of the nation’s produce, that state is facing significant challenges for water availability, Burchfield notes. “Georgia has a unique opportunity to expand its fresh-produce production to help meet future demand,” she says. “We want to provide farmers the resources they need to capitalize on such trends.” 

Building tools for the future of farming 

Burchfield’s research combines spatial-temporal social and environmental data to understand the future of food security in the United States, including the consequences of a changing climate. 

For the current project, the researchers will draw from available climate, soil and land-use data to create biophysical models for how changes in climate will affect where and how particular crops can be grown. These models will be integrated with data gathered from surveys and focus groups conducted with agricultural experts, climatologists and farmers working the land throughout Georgia, Iowa and Ohio. 

The project aims to get input from a diverse range of farmers growing different crops and using different management practices. 

“There is already a lot of work on what climate change may mean for agriculture in general,” Burchfield says. “But what climate change means for an individual farm must be filtered through issues particular to that farm. So many dimensions that matter deeply to farmers are not included in policy discussions about agriculture.” 

Farmers will be asked what information and resources they need to sustain their operations and to adapt to climate change. “We want to understand the vision that farmers have for the future of their farms,” Burchfield says. “What would they would like to see happen? What do they see as the barriers and bridges to achieving that vision?” 

The public, online tool that the researchers develop will include interactive maps for crop forecasts by region. It will also provide information to guide policymakers and to help farmers adapt to the changes ahead. 

“It’s impossible to accurately say exactly what’s going to happen in the future,” Burchfield says. “But combining biophysical data with an understanding of the technical, economic and political changes emerging in each of these states, along with the expertise of our farmers, will allow us to forecast trends for how suitable particular regions will be for growing certain crops. The bottom line is we are pulling together the best information available to give a sense of the emergent opportunities in the state for agriculture as well as the emergent challenges.” 

Related:

Emory breaking new ground for climate-smart agriculture

Climate change on course to hit U.S. Corn Belt especially hard

Monday, October 23, 2023

Emory breaking new ground for climate-smart agriculture in the Southeast

"Our project is unique in that it focuses on the Southern Piedmont and an often under served piece of our food system, but one that is vital to providing us the nutrients we need — the vegetable sector," says Emily Burchfield, assistant professor of environmental sciences.

Three Emory University researchers received $5,100,000 as part of a United States Department of Agriculture (USDA) project to help measure and promote climate-smart practices that support small-scale, diversified vegetable farmers in the Southern Piedmont. A plateau below the Appalachian Mountains and above the coastal plain, the Southern Piedmont is a banana-shaped region spanning a bit of eastern Alabama, up across part of northern Georgia and into North and South Carolina and Virginia. 

Emory is one of 12 organizations involved in the $25 million project, headed by the Rodale Institute and titled “Quantifying the Potential to Reduce Greenhouse Gas Emissions and Increase Carbon Sequestration by Growing and Marketing Climate-Smart Commodities in the Southern Piedmont.” 

The five-year project is part of the USDA’s Partnerships for Climate-Smart Commodities initiative. “This effort will increase the competitive advantage of U.S. agriculture both domestically and internationally, build wealth that stays in rural communities and support a diverse range of producers and operation types,” USDA Secretary Tom Vilsack says of the initiative. 

The Emory team encompasses three faculty from the Department of Environmental Sciences: Emily Burchfield, Eri Saikawa and Debjani Sihi. 

• Burchfield combines spatial-temporal social and environmental data to understand the future of food security in the United States. 

• Saikawa is an atmospheric chemist who models global soil nitrous oxide emissions and quantifies soil greenhouse gas fluxes. 

• Sihi is an environmental biogeochemist who researches soil organic matter dynamics and greenhouse gas emissions from natural and managed systems. 

Read more here.

Related:

Climate change on course to hit U.S. corn belt especially hard

Diverse land cover boosts yields for major U.S. crops, study finds 

Soil quality critical to help some U.S. crops weather climate change

Wednesday, September 20, 2023

Analyzing ways to help golden eagle populations weather wind-energy growth

"We are taking basic information about golden eagle ecology in the Anthropocene and developing it into predictive frameworks for how to protect them," says Eric Lonsdorf, Emory assistant professor of environmental sciences.

By Carol Clark

Wind energy is a major component of the U.S. clean-energy goals. Already one of the fastest growing and lowest-cost sources of electricity in the country, it is poised for even more rapid growth, according to the U.S. Department of Energy. 

Wind power, however, does not come without tradeoffs, including some negative impacts on wildlife. Throughout the United States, for example, it’s been estimated that as many as three golden eagles per wind farm are killed each year by wind turbines. 

“Renewable energy sources, including wind energy, are critical for us to achieve a net-zero emissions future,” says Eric Lonsdorf, assistant professor of environmental sciences at Emory University. “We need to address conflicts between renewable energy and wildlife conservation so that we can combat climate change while also limiting damage to biodiversity.” 

Lonsdorf and colleagues are developing data-driven methods to determine how much effort is needed to save golden eagles in order to offset the impact of wind turbines on their populations. 

The Journal of Wildlife Management recently published their latest model for calculating the benefit of one mitigation strategy — removal of large, road-killed animals that can lead to golden eagles getting hit by cars. 

Quantifying the benefits of natural capital

Lonsdorf is an expert in natural capital, or the quantifiable benefits that nature provides humans. He translates ecological principles and data into computer models that enable industry leaders and policymakers to better manage natural resources. 

Co-authors of the current study include James Gerber and Deepak Ray, from the University of Minnesota; Steven Slater, from HawkWatch International; and Taber Allison, from the Renewable Energy Wildlife Institute. 

The U.S. Fish and Wildlife Service (FWS) monitors golden eagle populations, which are protected through the Bald and Golden Eagle Protection Act and the Migratory Bird Treaty Act. Threats to golden eagles include loss of habitat and prey. 

Additional threats that are directly linked to human activities include illegal shootings, electrocution at power poles, lead poisoning from consuming parts of bullets in the entrails of deer carcasses discarded at the site of hunters’ kills, collisions with cars at sites where the birds are scavenging roadkill and collisions with the blades of a wind turbine. 

Across the western United States, hundreds of wind turbines have gone up in sage-brush flats that are part of golden eagles’ core habitat, and many more turbines are planned. In order to meet the permit requirements of the FWS, wind-energy companies must agree to mitigate their impact on the animals by offsetting the predicted number of golden eagles that will fly into their turbines each year. 

Currently, the only offset strategy approved by the FWS for wind-energy companies is to retrofit power poles to prevent golden eagles from becoming electrocuted. 

Adding empirical data

For the past five years, Lonsdorf and his colleagues have combined their expertise to develop a range of potential offset strategies for golden eagle fatalities. 

Their current paper — an updated model for golden eagle mortality due to vehicle collisions based on data from Wyoming — considered myriad factors such as the population density for golden eagles in the region, the number and size of deer roadkill carcasses expected and the traffic volume on the roads. The model also incorporated observational evidence of eagle-carcass roadside interactions obtained by motion-triggered cameras, data that was lacking in a previous model the researchers created. 

The addition of this empirical data allowed the researchers to make estimates for how long a golden eagle typically spends at a carcass, how the decay rate of the carcass affects the number of visits from eagles and the effects of seasonality on the scavenging behavior of the eagles. 

The model results suggest that carcass relocation is a viable golden eagle mitigation strategy that could save up to seven golden eagles annually in some Wyoming counties. On average, the model indicates that the prompt removal of four roadside carcasses would save at least one golden eagle. 

The researchers can make a user-friendly version of the prediction framework available to the FWS and wind-energy companies if the FWS decides to approve carcass removal as an eagle mortality offset strategy. 

“We’re taking basic information about golden eagle ecology in the Anthropocene and developing it into predictive frameworks for how to protect them,” Lonsdorf says. “As wind energy continues to grow, more mitigation strategies will likely be needed. Our goal is to provide scientific evidence for a portfolio of methods to help accomplish a zero-net loss of golden eagles from wind-energy facilities.” 

Related:

Valuing 'natural capital' vital to avoid next pandemic, global experts warn

International trade bans on endangered species tend to help mammals but hurt reptiles

Monday, August 7, 2023

Physicists open new path to exotic form of superconductivity

"Everything we learn about the world has potential applications," says Emory physicist Luiz Santos, senior author of the paper.

By Carol Clark

Physicists have identified a mechanism for the formation of oscillating superconductivity known as pair-density waves. Physical Review Letters published the discovery, which provides new insight into an unconventional superconductive state seen in certain materials, including high-temperature superconductors. 

“We discovered that structures known as Van Hove singularities can produce modulating, oscillating states of superconductivity,” says Luiz Santos, assistant professor of physics at Emory University and senior author of the study. “Our work provides a new theoretical framework for understanding the emergence of this behavior, a phenomenon that is not well understood.” 

First author of the study is Pedro Castro, an Emory physics graduate student. Co-authors include Daniel Shaffer, a postdoctoral fellow in the Santos group, and Yi-Ming Wu from Stanford University. 

The work was funded by the U.S. Department of Energy’s Office of Basic Energy Sciences. 

The puzzle of superconductivity 

Santos is a theorist who specializes in condensed matter physics. He studies the interactions of quantum materials — tiny things such as atoms, photons and electrons — that don’t behave according to the laws of classical physics. 

Superconductivity, or the ability of certain materials to conduct electricity without energy loss when cooled to a super-low temperature, is one example of intriguing quantum behavior. The phenomenon was discovered in 1911 when Dutch physicist Heike Kamerlingh Onnes showed that mercury lost its electrical resistance when cooled to 4 Kelvin or minus 371 degrees Fahrenheit. That’s about the temperature of Uranus, the coldest planet in the solar system. 

It took scientists until 1957 to come up with an explanation for how and why superconductivity occurs. At normal temperatures, electrons roam more or less independently. They bump into other particles, causing them to shift speed and direction and dissipate energy. At low temperatures, however, electrons can organize into a new state of matter. 

“They form pairs that are bound together into a collective state that behaves like a single entity,” Santos explains. “You can think of them like soldiers in an army. If they are moving in isolation they are easier to deflect. But when they are marching together in lockstep it’s much harder to destabilize them. This collective state carries current in a robust way.” 

A holy grail of physics 

Superconductivity holds huge potential. In theory, it could allow for electric current to move through wires without heating them up, or losing energy. These wires could then carry far more electricity, far more efficiently. 

“One of the holy grails of physics is room-temperature superconductivity that is practical enough for everyday-living applications,” Santos says. “That breakthrough could change the shape of civilization.”

Many physicists and engineers are working on this frontline to revolutionize how electricity gets transferred. 

Meanwhile, superconductivity has already found applications. Superconducting coils power electromagnets used in magnetic resonance imaging (MRI) machines for medical diagnostics. A handful of magnetic levitation trains are now operating in the world, built on superconducting magnets that are 10 times stronger than ordinary electromagnets. The magnets repel each other when the matching poles face each other, generating a magnetic field capable of levitating and propelling a train. 

The Large Hadron Collider, a particle accelerator that scientists are using to research the fundamental structure of the universe, is another example of technology that runs through superconductivity. 

Superconductivity continues to be discovered in more materials, including many that are superconductive at higher temperatures.  

An accidental discovery 

One focus of Santos’ research is how interactions between electrons can lead to forms of superconductivity that cannot be explained by the 1957 description of superconductivity. An example of this so-called exotic phenomenon is oscillating superconductivity, when the paired electrons dance in waves, changing amplitude. 

In an unrelated project, Santos asked Castro to investigate specific properties of Van Hove singularities, structures where many electronic states become close in energy. Castro’s project revealed that the singularities appeared to have the right kind of physics to seed oscillating superconductivity. 

That sparked Santos and his collaborators to delve deeper. They uncovered a mechanism that would allow these dancing-wave states of superconductivity to arise from Van Hove singularities. 

“As theoretical physicists, we want to be able to predict and classify behavior to understand how nature works,” Santos says. “Then we can start to ask questions with technological relevance.” 

Some high-temperature superconductors — which function at temperatures about three times as cold as a household freezer — have this dancing-wave behavior. 

The discovery of how this behavior can emerge from Van Hove singularities provides a foundation for experimentalists to explore the realm of possibilities it presents. 

“I doubt that Kamerlingh Onnes was thinking about levitation or particle accelerators when he discovered superconductivity,” Santos says. “But everything we learn about the world has potential applications.” 

Related:

Chemists crack complete quantum nature of water 

New evidence for a unifying theory of granular physics

Friday, November 18, 2022

Emory students promote youth power at U.N. conference

Eri Saikawa, associate professor of environmental studies (bottom, right) led a delegation of students to the U.N. Framework Convention on Climate Change in Egypt. Click here to see bios of the delegation members.

By Carol Clark

Emory students helped raise the profiles of youth activists during this year’s United Nations Framework Convention on Climate Change, better known as COP, continuing through Nov. 18 in Sharm El-Sheikh, Egypt. 

A delegation of five Emory undergraduates and four graduate students, led by Eri Saikawa, associate professor of environmental sciences, attended the first week of COP as official U.N. observers. They sat in on negotiations and co-hosted a side event with the Climate Justice Program entitled “Youth: From Resistance to Power.” The event featured a panel discussion by four young activists — from Pakistan, Kenya, Mexico and the Philippines — followed by an interactive networking event moderated by the Emory students. 

“It’s inspiring and energizing seeing so many youth raising their voices and pushing for climate action,” says Saikawa. 

Saikawa began leading students from her Climate Change and Society class to the annual global climate talks in 2015, when COP was held in Paris. That year, nearly 200 member countries hammered out the Paris Agreement, aiming to keep the global mean rise in temperature to no more than 2 degrees Celsius above preindustrial levels. 

Student delegates will share what they learned during this year’s COP at a campus event entitled “Climate Conversations: Advancing Towards Global Justice” on Thursday, Nov. 17 at 6 pm in the Emory Student Center, multi-purpose rooms 5 and 6. Attendees can join in activities geared to the topics of environmental justice, climate and business, urban planning, conservation and more. 

The students will also produce podcasts on different aspects of COP for the Emory Climate Talks AmpliFIRE series. 

Following are brief summaries of the experiences and views of four of the Emory undergraduates who traveled to Egypt for COP. 

"Right after we touched down in Sharm El-Sheikh we grabbed our badges and headed to the conference," says Gabriela Rucker, right, shown with fellow senior Clare McCarthy.

“It was exciting to be immersed among 45,000 people working to generate solutions to the climate crisis," says Gabriela Rucker, a senior majoring in environmental sciences on the social science and policy track. 

Her interest in sustainable agriculture took her to the food-systems pavilion. She learned about programs to compensate farmers for preserving ecosystems and the increasing use of seaweed as a nutrient. “That was cool, right off the bat, to hear about those food solutions.” 

Rucker is a member of the Plastic-Free Emory task force and appreciated insights from Eric Njuguna, an activist from Kenya, during the “Youth: From Resistance to Power” event. 

“The United States exports a significant amount of plastics and other recycling abroad, where it ends up in landfills and becomes another country’s problem,” she says. “Eric Njuguna talked about his experiences dealing with trash from the United States. It’s important that people in the United States understand where our trash goes when we throw it away.” 

The connections she made during COP were a highlight for Rucker. “I met a lot of youth with passion and drive,” she says. “We have our careers in front of us so connecting with fellow youth about where they want to go and what they want to work on was invaluable.” 

Rucker is currently an intern at a solar-power development company. “My dream job would involve building solar plants to provide clean electricity for the United States,” she says. “During the next 20 years we need to build out a significant amount of renewable energy infrastructure.” 

Ultimately, COP further fueled her optimism. “I generally have a lot of hope for the progress of humanity,” Rucker says. “I’ve witnessed throughout my life people’s work toward a cleaner and more equitable society. My hope stems from the people who are doing the work to make that vision happen.”

Senior Jack Miklaucic is grateful for the anonymous donor who funds the trips by Emory students to COP. "It's a tribute to Dr. Saikawa's work that a donor is willing to do this for her students year after year," he says.

“The best part of COP for me was attending events led by civic groups doing energy-justice advocacy, which is the kind of work that I want to do,” says Jack Miklaucic, a senior majoring in environmental sciences and philosophy, politics and law. “They were led by really cool people who are fearless about calling out the fossil fuel companies and speaking truth to power. Hopefully, their examples will make me a more effective activist going forward.” 

Miklaucic plans to attend law school and hopes for a career involved with ensuring that utility companies and other energy providers are better regulated. “I want my work to have a direct, positive impact on society,” he says. 

“Enhancing energy efficiency is a big win for everybody,” Miklaucic adds. “It will improve people’s lives on the economic, climate and health levels. We’re already seeing movement toward more energy efficiency so that provides incentive to keep working towards more.” 

He is optimistic regarding climate solutions. “We were looking at a 3-to-4-degree Celsius rise in the global temperature average a few years ago and that’s no longer likely,” he points out. ”It’s important to stay focused on what kind of impact we can make because every tenth of a degree matters for what kind of world we’re going to live in.” 

Miklaucic appreciated the international perspective he gained from COP. “It was interesting to learn how climate activism is different around the world,” he says. “In some places they are persecuted and outright killed for doing what they do. It drove home to me that while it can be frustrating at times working for energy justice in the United States, it’s also a much safer place to be doing it.” 

"Every single person will be affected," says senior Clare McCarthy of climate change.

Clare McCarthy is a senior majoring in environmental sciences on the community building and social change track. She is also pursuing the 4+1 BS/MPH in environmental health at Rollins School of Public Health. 

She began learning about how the climate crisis is a social justice issue while she was in high school. It made her feel guilty to realize how people in the Global South tend to disproportionately suffer the greatest impacts of climate change as opposed to more privileged people in her hometown, where climate change felt distant. 

“That guilt paralyzed me,” she recalls, “until I came to Emory, when I decided to take action.” McCarthy is involved in efforts to hold the Emory administration accountable to stronger climate action through the Emory Climate Coalition and Emory Climate Reality Project. 

COP helped solidify her interest in loss and damage, or the harmful impacts of climate change, as well as efforts by local communities to adapt. She learned more about these issues first-hand by talking to leaders of nongovernment organizations, such as the International Center for Climate Change and Development, based in Bangladesh. 

“Loss and damage and how to address it became a headline issue for the first time at this year’s COP,” McCarthy says. “While it’s great to see this, it cannot be celebrated as a final victory because it’s way overdue and much more work is needed.” 

Countries in the Global South are asking countries in the Global North to set up a mechanism for financing recovery from both economic and health impacts due to climate events. “They want the money to be payments and not in the form of loans because then they will be in debt,” McCarthy says.

She envisions a career working internationally or within the United States to help communities build their capacity to respond to climate change. 

“It makes me feel hopeful to meet so many impressive people working on solutions,” McCarthy says. “The passion and dedication of my fellow activists, here at Emory and in communities around the world, keeps me going.” 

"Climate change is the greatest challenge that my generation faces," says senior Jackson Pentz, second from right. While in Egypt he visited the Great Sphinx of Giza along with his fellow undergraduates, (from left) Clare McCarthy, Gabriela Rucker, Jack Miklaucic and Nick Chang. 

“A lot of people associate environmental science with governmental policy but I’ve always been interested in business as a way of creating social change,” says Jackson Pentz, a senior majoring in Economics and Environmental Science on the Social Science and Policy Track. Pentz is also a member of the Goizueta Business School’s Environmental Management program. 

At COP he was impressed to learn that companies that compete for market share are actually collaborating on sustainability. “Many businesses are finding that in order to address sustainability issues they need to pool their research-and-development funding and share their knowledge,” he says. “The private sector is taking sustainability seriously and can come together more quickly and effectively than governments.”

Pentz already has a job lined up after he graduates in May. He’ll be working as a business consultant at McKinsey and Company specializing in sustainability and natural resources. 

Thinking about the climate crisis at the global, or even the national, level can make you feel helpless, he says. “But if you zoom in on individuals or organizations at the smaller scale, you start to see lots of positive action that can be replicated to make a bigger impact,” he adds. 

At the “Youth: Resistance to Power” event Pentz was buoyed by the remarks of Ayisha Saddiqa, a young climate justice activist who grew up in Pakistan as the member of an Indigenous community.

“She told us that young people shouldn’t feel responsible for saving the world. That’s obviously too big of a burden,” Pentz says. “But she personally feels responsible for working to help her community. If everybody does something manageable to help those around them, that’s how you start a social movement and collective action to improve things on a global scale.”

Related:

Youth views on climate take the world stage

Peachtree to Paris: Emory delegation headed to climate talks