President Trump is on to something if we were to broaden the definition of pollution, as we once did, to include polluting chemicals that contaminate water, air and the land, including habitats.

But what does that mean for those people who live, work, or go to school or college in those areas? We asked experts to explain what air pollution is, where it comes from, and how it affects us.

The EPA rule was intended to provide a national solution to the problem of ozone pollution, but challengers said it relied on the assumption that all 23 states targeted by the rule would participate.

Dust from Sevier Dry Lake in southern Utah blows particulate as far north as Salt Lake City, but it also holds a vital mineral for growing high-value crops.

High pollution levels may mean people with asthma may need their inhalers more. At level 10, adults and children with lung or heart problems, and older people, ...

Air pollution is still a major problem in the US: 45 cities have PM2.5 concentrations above those recommended for healthy air. And if you think you are safe from air pollution inside your home ...

A number of recent studies have drawn stronger connections between air pollution and serious health problems than previously understood, but there are several methods experts recommend individuals ...

Humanity’s use of plastic has grown exponentially since the 1950s. Today, nine million people worldwide are employed in plastic production and processing, and while they are lightweight and affordable ...