Allegheny County’s air quality remains mixed while asthma related ER visits drop. Clean-air advocates still continue to fight.

On Tuesday at 1:19 p.m. the NWS San Diego CA reported an air quality alert in effect until Wednesday at 1:30 p.m. for ...

There was a stark transition into the Industrial Valley beyond the Flats, where the landscape gave way to mounds of crushed ...

High fine particulate matter levels in the air drive Wayne and Kalamazoo counties to be redesignated as nonattainment areas ...