Toxic gas emissions in London fell by 27% following a 2023 expansion of the city's clean air zone, which imposes a levy on ...

This measure, based on data from the Environmental Protection Agency, evaluates states on the number of days the Air Quality Index in counties was not rated “good.” U.S. News calculated a ...

Bakersfield’s poor air quality owes to a combination of factors: emissions from the area’s energy and agriculture industries, a dry, dusty climate and a low lying geography in which polluted ...