Environment

As President Obama prepares to unveil his executive strategy on climate change, we look at the politics of the issue in Congress.

Tawny crazy ants are invading ecosystems and homes in states including Texas and Florida, wiping out other ant species and overwhelming homeowners. Weekend Edition Saturday host Scott Simon talks to Texas A&M research scientist Robert Puckett, who says the ants are "ecological steamrollers" that reproduce so fast they are nearly impossible to get rid of.

The Standard Heights neighborhood sits next to the nation's second-largest gasoline refinery. Recently, residents learned a new truth about the plumes of exhaust they see every day: Exxon Mobil's aging refinery and petrochemical facilities — like many others — are pumping out far more pollution than the law allows.

In a speech in Germany Wednesday, President Barack Obama said it's time to take "bold action" on climate change. Many believe that major changes to policies on carbon emissions lie ahead, which would mean a host of new regulations for businesses.

Last fall, Heather Liljengren was collecting the seeds of New York's native dune grasses. Within days, Hurricane Sandy wiped out the Rockaways' dunes and all their flora. Now, those seeds are growing plants likely to be used to restore the dunes and other natural environments around New York City.

So often, we take water for granted. But it's not always where we need it, or there when we need it. Two rivers on opposite sides of the country — the Chattahoochee in the South and the Klamath in the far West — may provide lessons for the inevitable and growing dispute over how we manage our most precious resource.

Like any major city near a coast, Seattle likely won't be immune from rising sea levels and other effects of global warming. Mayor Mike McGinn discusses the city's plans for addressing climate change, including his push to divest Seattle's pension funds from fossil fuel investments, and the city council's plan to make Seattle carbon neutral by 2050.

Since his days as head of the Solar Energy Research Institute under President Jimmy Carter, Denis Hayes has been pushing to add more renewable energy sources to the country's energy portfolio. Hayes discusses the current U.S. market for renewables such as solar and wind, and gives his take on where he sees America's energy future headed.

Carbon emissions are slowly acidifying ocean waters, forcing marine life to adapt. Oysters and other shellfish, for example, may have a harder time building their shells, according to NOAA's Richard Feely. At Quilcene, Washington's Taylor Shellfish Hatchery, research director Benoit Eudeline says he's already seeing those effects.

Investors like Gates are betting that our planet can't sustain the current rate of growth in animal-based foods for too much longer. Products like Beyond Eggs, a plant-based substitute, are designed to fill the void.

Birds flock. Insects swarm. Fish swim in schools. These are all examples of collective behavior, a concept that has fascinated scientists for decades. For a recent piece in Wired Magazine, science writer Ed Yong explains what this research could tell us about predicting the future.