California is home to 15 of the 30 places in the US with the worst air pollution – USA TODAY

Excerpt:

Air quality in the United States has been worsening over the last three years – and it’s killing people. While air quality had been improving since 2009, the trend reversed in 2016. Nearly 10,000 premature deaths have been attributed to this increase alone, according to the National Bureau of Economic Research.

As of 2019, more than 141 million Americans live in places with unhealthy levels…