Clean Air

Tony Webster/Flickr

The decision by President Donald Trump to pull the U.S. out of the Paris Climate Accord has pushed environmentalists to file several lawsuits against the federal Environmental Protection Agency.

National Parks Service

Eight Northeast and Mid-Atlantic states filed a petition with the Environmental Protection Agency on Monday seeking to force nine other states to reduce their air pollution.

WAMC/Pat Bradley

The state of Vermont is reaping the benefit of national clean air policies.