U.S. Rep. Jo Ann Emerson weighed in Wednesday on the question of whether three Southeast Missouri counties should be named as nonattainment areas for ozone pollution. Emerson, in a news release ...

Weld County officials are pushing for more transparency in the state’s development of ozone control strategies as they question data referenced by Gov. Jared Polis and state agencies in Polis’ ...

This archived news story is available only for your personal, non-commercial use. Information in the story may be outdated or superseded by additional information. Reading or replaying the story in ...

After years of failing to meet Clean Air Act standards, metro Phoenix won its argument that nonlocal ozone shouldn't count.

Add Yahoo as a preferred source to see more of our stories on Google. SHEBOYGAN COUNTY - Wisconsin Department of Natural Resources staff presented updates on Sheboygan County’s air quality at a ...