One of the biggest environmental issues in our modern world is plastic, which has become integral in the manufacturing of everything from electronics to furniture. Our reliance on plastic has led to a recycling crisis: A vast amount of plastic that winds up in our recycling bins isn’t actually recyclable, and ultimately winds up in landfills. Large companies have committed to reducing plastic packaging and cutting back on waste. But there’s still no good way to scale up the removal of plastic that already exists. Waste-eating bacteria and enzymes have been shown to work in lab settings, but th ..read more

Superfund sites are some of the most polluted areas in the country, containing highly toxic waste such as asbestos, lead, and dioxin. Cleaning them up, which follows a systematic, science-based process as required by law, can take decades. There are more than 1,300 of these sites across the US, from Florida’s Panhandle to the banks of the Rio Grande in New Mexico. They’re found in nearly every state, often near residential areas. The EPA estimates that 78 million people live within three miles of a Superfund site—nearly 1 in 4 Americans. But these waste dumps face a growing threat: the worseni ..read more

An explosion of research is painting a clearer picture of how climate change is affecting mental health across the globe. Also, a citizen science project aims to find species that have gone unnoticed by sampling the waters of hundreds of lakes worldwide for environmental DNA. Assessing The Global Mental Health Toll Of Climate Change As the effects of climate change become more visible and widespread, people around the globe are dealing with the mental health impacts. But what are those impacts exactly, and how do they differ between people in different parts of the world? That’s been the focus ..read more

Global temperature increases are slowing, electric vehicle sales are growing, and renewable energy is now cheaper than some fossil fuels. Also, in a recent outbreak of avian flu, the virus has jumped from birds to cows, and to one dairy worker. A disease ecologist provides context. Progress Toward A Clean Energy Transition In honor of Earth Day, we’re highlighting a few positive trends and some promising solutions to the climate crisis. Globally, a clean energy transition is underway. A recent column in cipher, an online news outlet focused on climate solutions, recapped some encouraging progr ..read more

College basketball’s March Madness concluded this week, meaning that now the national sports attention can turn fully to baseball. The next time you’re at the ballpark—whether you’re devoted enough to fill in the box scores by hand, or are just there for the peanuts and crackerjacks—take some time to appreciate the physics of the game. There are tricky trajectories, problems of parabolas, converging velocities, and the all-important impacts. Dr. Frederic Bertley, the president and CEO of the Center of Science and Industry in Columbus, Ohio, joins Ira to talk about the science of sports, and ab ..read more

Some food has a larger carbon footprint when grown in urban settings than on commercial farms, while for other foods the reverse is true. Also, what’s the difference between wildflowers blooming in the desert each spring, and the rare phenomenon of a “superbloom”? The Carbon Cost Of Urban Gardens And Commercial Farms If you have a home garden, you may be expecting that the food you grow has less of an environmental impact than food grown on large commercial farms. But new research throws some cold water on that idea. A study led by scientists at the University of Michigan examined 73 small urb ..read more

Half of the cells in the brain are neurons, the other half are glial cells. When scientists first discovered glia over a century ago, they thought that they simply held the neurons together. Their name derives from a Greek word that means glue. In the past decade, researchers have come to understand that glial cells do so much more: They communicate with neurons and work closely with the immune system and might be critical in how we experience pain. They even play an important role in regulating the digestive tract. Ira is joined by Yasemin Saplakoglu, a staff writer at Quanta Magazine who has ..read more

A long-awaited rule from the EPA limits the amounts of six PFAS chemicals allowed in public drinking water supplies. Also, some spiders, beetles, and centipedes spend winter under snow in a layer called the subnivium. Plus, a drumroll for the total solar eclipse. EPA Sets Limits On ‘Forever Chemicals’ In Drinking Water This week, the EPA finalized the first-ever national limits for the level of PFAS chemicals that are acceptable in drinking water supplies. Those so-called “forever chemicals,” per- and polyfluoroalkyl substances, have long been used in products like fire retardants and oil-and ..read more

When a critter meets its end at the Smithsonian’s National Zoo, it ends up on a necropsy table—where one of the zoo’s veterinary pathologists will take a very close look at it, in what is the animal version of an autopsy. They’ll poke and prod, searching for clues about the animal’s health. What they do—or don’t—find can be used to improve the care of living animals, both in the zoo and in the wild. On stage in Washington, D.C., Ira talks with Dr. Kali Holder, veterinary pathologist at the Smithsonian’s National Zoo and Conservation Biology Institute, about her work, and they embark on a case ..read more

The Chesapeake Bay produces around 500 million pounds of seafood every year, providing delicious blue crabs, striped bass, oysters, and more to folks up and down the coast. It’s one of the most productive bodies of water in the world, but the bay is constantly in flux due to stressors like overfishing, pollution, and climate change. But scientists have a plan to conserve the bay’s biodiversity, support the people who rely on it, and keep us all well fed—and it involves oyster farming. On stage in Washington, D.C., Ira talks with Imani Black, aquaculturist, grad student at the University of Mar ..read more