Toxic pollution affects more than 200 million people worldwide, according to Pure Earth, a non-profit environmental organization.In some of the world's worst polluted places, babies are born with ...

Air pollution is still a problem for nearly half of Americans, report finds Despite improvements in air quality in past decades, 156 million Americans still breathe in too much soot or ozone, says ...

Exposure to unhealthy levels of air pollution during pregnancy may prolong postpartum depression symptoms in new mothers, according to new research. A team of researchers from the University of ...

Out of the 10 U.S. cities with the worst ozone pollution, the San Diego-Chula Vista-Carlsbad metro ranked eighth with an annual average of 27.5 high ozone days, the report said.

Air pollution used to be much worse. In October of 1948, a thick, choking smog settled over the small Pennsylvania town of Donora. The town was home to two steel plants.

Phoenix, Arizona, and Dallas, Texas, also rank in the top 10 most smog-heavy cities. ... Scientists have also explored how and why different types of air pollution harm health.

Phoenix, Arizona, and Dallas, Texas, also rank in the top 10 most smog-heavy cities. ... Scientists have also explored how and why different types of air pollution harm health.