Smoke from Canadian wildfires has carried another day of poor air quality south of the border to the American Midwest.

Air quality alerts advising people to stay indoors were issued earlier in the week and lasted through part of Wednesday ...

Washington, D.C. — The Trump administration’s assault on environmental protections could trigger millions of asthma attacks while giving polluters a free pass, according to a new report from the ...

Launched by UCLA and American Forests to combat heat-related deaths, the tool maps the shade infrastructure for over 360 U.S.

Urban air pollution, low greenness, and dense built environments significantly increase asthma risk across life stages, ...

Smoke spreading from wildfires in Canada​ was affecting air quality in multiple states, including Minnesota​ and Wisconsin.