Nearly 200 members of Congress on Tuesday signed an amicus brief in a Supreme Court case, urging it to affirm a lower court ruling that allows the Environmental Protection Authority to maintain its full powers to enforce the Clean Air Act.

The landmark Clean Air Act case argued before the Supreme Court yesterday could reverberate around Capitol Hill at a critical time for environmentalists and climate advocates.

The Supreme Court ​​​​​​said yesterday that it would hear a challenge to the scope of the Clean Water Act, sparking concern from environmentalists that the high court could narrow the law's reach “in ways long sought by developers and homebuilders.”