A form of harmful air pollution that often can't be plainly observed is now being tracked with a groundbreaking new tool developed by scientists that allows residents to see where it's coming from.

Fears of climate change are decreasing in the United States, China and many Western countries relative to other concerns, according to a new survey. War, economic hardship and disease were more ...

Click the downloadable graphic: States at Risk from Coastal Floods In the U.S., coastal floods now happen three times more often than they did 30 years ago — and the frequency and intensity of coastal ...

For the first time, scientists have mapped groundwater variables nationally to understand which aquifers are most vulnerable to contamination from orphan wells. Oil and gas wells with no active owner ...

The chytrid fungus disease is responsible for global amphibian population declines, such as the endangered limosa harlequin frog shown above. Brian Gratwicke, Smithsonian’s National Zoo and ...