The party-line vote marked the first time in the 55-year history of the Clean Air Act that Congress has moved to weaken the ...

The Environmental Protection Agency offered coal-fired power plants and other industrial polluters a chance to apply for a ...

If also passed by the House as expected, the action will be the first time Congress has weakened protections under the Clean ...

Congress is one step closer to barring California from enforcing its own emissions standards and banning sales of gas-powered ...

Utah counties are struggling when it comes to clean air, according to a new report from the American Lung Association and ...

Court documents show that CARB intends to repeal the ACF regulations related to so-called "high-priority" fleets and drayage ...

Lawmakers voted to stop the state from requiring that an increasing share of new trucks sold there have zero emissions.

Colorado is now in severe violation of two federal ozone pollution standards, and it must find a way to reduce that pollution ...

When it comes to regulating motor vehicle emissions, California has long been different. California was the first state in the nation to ...