air pollution

Rick Bowmer / AP

Transportation — trucks, trains, planes and automobiles — is a major source of greenhouse gas emissions in the U.S. Electric vehicles offer a less polluting alternative. That, and reduced fuel costs are strong selling points. Limited battery range is not.

But shorter distances, and those savings, work for many local governments. Last month, Savannah added two new electric cars to its city fleet. Nick Deffley is the director of Savannah's Office of Sustainability. He joined On Second Thought from GPB's studio in Savannah to talk about how the city began its transition to electric vehicles.


South Korea faces a chronic dirty air problem that makes it one of the most polluted countries in the world. It's common to hear that neighboring China is to blame, but a joint study by NASA and the Korean government has found there's a lot South Korea can do on its own to cut the smog.

Heidi Vreeland / Duke University

In a recently published study, researchers at Georgia Tech, Emory and Duke examined pollution levels drivers are exposed to inside their vehicles during rush hour in Atlanta. Counter to their expectations, researchers found that drivers are exposed to a significant amount of dangerous pollutants during those times.

The air Americans breathe has been getting cleaner for decades.

But air pollution is still killing thousands in the U.S. every year, even at the levels allowed by the Environmental Protection Agency, according to a study out Wednesday.