According to the World Health Organization (WHO), air pollution is a contamination of the indoor and outdoor environment that is caused by chemical, physical or biological agents. As per data, 99 per ...

Chicago’s air quality was among the worst in the world Thursday afternoon, according to IQAir. The air quality in Chicago around 4:30 p.m. Thursday was the second worst in the world, behind Kinshasa, ...

Light winds combined with Northern California's geography allow pollution to build up in the Valley. This can include harmful ...

Only 12 regions on Earth meet the WHO guideline figure for acceptable air pollution levels. On the other hand, tens of regions exceed it by more than 10 times that figure. Air pollution is among the ...