Vast clouds of dense, toxic smog have once again ... that were once notorious for dirty air have managed to clean it up. The process took years, drawing on economic development and new technologies.

Congress has voted to undo a Clean Air Act regulation that strictly controls the amount of toxic air pollutants emitted by many industrial facilities like oil refineries, chemical plants ...

The Senate voted Thursday to overturn an Environmental Protection Agency rule limiting the seven most hazardous air pollutants emitted by chemical plants, oil refineries and other industrial ...

Oct. 20—New Mexicans have less than a month left to submit their thoughts on if the federal government should make an Albuquerque neighborhood with contaminated air a national cleanup priority.

The House and Senate both voted to loosen regulations on air pollutants like dioxin and mercury, which are associated with ...