Earlier this week, the EPA rolled back some guidelines from the Clean Air Act. Arizona state lawmakers on both sides of the ...

The green light came courtesy of President Donald Trump and was part of a flurry of measures announced to prop up the coal ...

This week, the EPA announced that it’s ditching part of the Clean Air Act’s guidance that made it harder to prove foreign ...

The move will give state regulators more time to develop a plan to improve air quality in metro Denver and the region, and to ...

The facility, in Colstrip, Mont., used a new E.P.A. system for requesting special waivers from President Trump.

The assessments rank among the agency’s most closely watched regulatory endeavors and can lead to new limits on industrial ...

A Republic reader is concerned about the effects of air pollution on children, and wants to know how to push for change.