Urban particles shape climate by influencing clouds and radiation. Vertical monitoring reveals overlooked impacts.

In many parts of India, a single noxious pollutant from coal-fired power stations drags down annual wheat and rice yields by ...

With a chunk of federal funding for PFAS, Nevada’s state water regulators are doing more comprehensive testing.

Urban wildfires like LA’s make harmful chemicals from burning plastics and electronics that can make indoor air dangerous for months.