The chemical composition of air pollution in the United States has changed over time, a new study has found. The report, published in the journal Atmospheric Environment by the University of North ...

A new study analyzed space and time trends for fine particulate matter (PM2.5) in the continental United States to track the progress of regulatory actions by federal, state and local authorities ...

(CNN) - Scientists believe they have identified the world's cleanest air, free from particles caused by human activity, located over the Southern Ocean, which surrounds Antarctica. In a ...

One in seven children across the globe breathes dangerously toxic air, according to a new UNICEF report released today. Using satellite imagery, the children’s aid organization determined that 300 ...