Studies based on private health data are crucial to understanding dangers posed by pollution. A new rule makes it harder for the EPA to consider many studies when setting safeguards.
Air quality is awful in New Delhi in winter. Smoke from the fireworks of the Hindu festival of lights adds to the problem. That's a cause for concern during a pandemic caused by a respiratory virus.
Hurricane Laura hit an area known for its refineries and chemical plants. They released millions of pounds of air pollution when they shut down, and many air monitors are not functioning.
A new study finds that the U.S. places with the most polluted air in the 1980s remain the most polluted today. Poor people and people of color are more likely to live in places with dirty air.
