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.

Stepping out during pollution season in many Indian cities feels like walking through a soft cloud that you cannot escape. The air smells burnt, your eyes sting a little, and you can almost feel the ...

Ozone pollution, typically associated with warm weather and strong sunlight, has begun to manifest alarmingly in winter. This surprising phenomenon has surfaced in several regions, most notably ...

Weakening or rolling back longstanding environmental regulations would worsen the problem, the American Lung Association assessment says. By Rebecca Dzombak At least 156 million Americans, about 46 ...

Ozone pollution isn’t just a summer story anymore. In parts of northern China, high ozone levels are now appearing during winter—an alarming twist that defies decades of air quality science. This ...

In the stratosphere, ozone acts as a protective layer. But in the troposphere, at ground level, this colorless gas is incredibly harmful to human health and the environment in ways scientists are ...

A study has found that implementing robust air pollution control measures could mean Southeast Asian countries prevent as many as 36,000 ozone-related premature deaths each year by 2050. A study by ...