The air turned orange—and the whole city felt it. As smoke from Canadian wildfires blanketed New Haven in 2023, it sent fine particle pollution soaring to more than 15 times the normal daily level.

Pollution from the expanding shoreline of the Salton Sea may not be significant contributor to the region’s air problems. Some researchers suggest more emphasis on what people are breathing at home, ...

A new study reveals that premature deaths and illnesses from air pollution related to gas and oil operations disproportionately affect Black, Indigenous, Asian and Latino communities. California ...