Cities across the East Coast were blanketed with hazy and smoky conditions this week from fires burning across Canadian territory. The Air Quality Index (AQI) in New York City, Philadelphia and ...

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Don't let the soft, sepia tones fool you. The United States used to be dangerously polluted. Before President Richard Nixon created the Environmental Protection Agency in 1970, the environment and its ...

Los Angeles has struggled with air pollution problems since before smog became a term. In 1943, smog covered the city so thickly that residents thought they were under a chemical attack. The creation ...

Before environmental regulation, New York City struggled with severe pollution. The city's coastlines were often the sites of illegal dumping. Pollution regulations began after the Environmental ...

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Almost half of everyone who lives in the United States breathes unhealthy levels of air pollution, according to the American Lung Association’s annual State of the Air report, released Wednesday.

Air in the U.S. has gotten cleaner for decades, adding years to people's lives and preventing millions of asthma attacks, but nearly half of Americans still live with unhealthy air pollution, a new ...

A growing body of research is showing how breathing polluted air impairs the immune system’s ability to regulate inflammation—and leads to other serious health conditions. Flames and smoke billow from ...