Republican senators are wading into a long-running fight over a key EPA policy to limit releases of arsenic, benzene and dozens of other air toxics linked to serious health problems. In S.J. Res.

The five air toxics that Colorado selected all have negative impacts on health. Four are known to cause cancer. Finally, long-term exposure to hydrogen sulfide can cause low blood pressure ...

Toxics in the air from urban wildfires may include dioxins, asbestos, and lead. But testing, until recently, for these air toxics has been limited.

But it doesn’t mean it is all gone,” he said. The AQMD will do a second Eaton fire area survey the week of Feb. 10. The first Palisades mobile survey for air toxics also will begin next week ...

Calling it the "biggest deregulatory action in U.S. history," the Environmental Protection Agency rolled out sweeping moves ...

The Suncor Refinery in Commerce City, Colo., is a known air polluter. RJ Sangosti/The Denver Post via Getty Images ...

The five air toxics that Colorado selected all have negative impacts on health. Four are known to cause cancer. Finally, long-term exposure to hydrogen sulfide can cause low blood pressure ...