smog

Extreme heat in Mecklenburg County increases pollutants like ozone and smog due to stagnant air, sunlight, and high temperatures. Health risks are heightened for sensitive groups, and motor vehicles are identified as a major local pollution source.

A new study finds that wildfires have worsened ozone levels across the United States, reversing about four years of air quality progress. Tailpipe emissions standards had previously reduced smog levels, but longer, more intense fire seasons have erased much of that progress over the last decade.

The United States reduced national smog levels for over a decade, but since 2015, increasingly larger wildfires have reversed this progress, leading to dirtier and deadlier air.

The United States reduced national smog levels for over a decade, but since 2015, smoke from increasingly larger wildfires has reversed this progress, making the air dirtier and deadlier.

The U.S. reduced national smog levels for over a decade, but since 2015, smoke from increasingly larger wildfires has reversed this progress, worsening air quality and public health. A new study links the trend to dirtier, deadlier air.

A study finds that U.S. smog levels, which had decreased for over a decade, are now increasing due to larger wildfires since 2015, leading to dirtier and deadlier air.

A new study finds that smoke from larger wildfires is reversing more than a decade of American improvements in smog. Wildfires are making the US smoggy again, according to the research.

A new report reveals that 156 million U.S. residents live in areas with 'F' grades for smog and soot pollution, indicating widespread exposure to unhealthy air quality levels.