"NEW YORK — Environmental groups that say they’re seeking to restore clean air standards for vehicles on the nation’s highways have sued the federal government in New York.

The Natural Resources Defense Council, the U.S. Public Interest Research Group and Clean Air Carolina sued the Department of Transportation and the Federal Highway Administration on Monday, saying a federal safeguard meant to reduce climate-changing emissions was abruptly withdrawn in May."

The Associated Press had the story July 31, 2017. [2]