The GOP effort to kill the rules could have a profound impact on California’s longtime efforts to curb air pollution.

The Senate has overruled the guidance of the parliamentarian, a nonpartisan staffer who interprets the Senate's rules, and voted 51 to 44 to overturn a waiver allowing California to set its own air po...

The House budget bill that narrowly passed in an early morning vote on Thursday would effectively put the brakes on a clean energy production boom in the United States spurred by tax credits enacted i...