From the smog–choked streets of Delhi to the suffocating skies over Eastern Europe, air pollution is a deadly threat to city dwellers all around the world. Now, terrifying charts have revealed the ...

A new report shows air pollution threatens the majority of the world’s population, while information gaps increase the risks.

California and Oregon are among the U.S. hotspots for dangerous submicron (PM1) air pollution—those with particles less than a micron, or a millionth of a meter wide—according to new research.