How decades of L.A. smog led to California’s war with Trump over car pollution - The Washington Post

"People don't realize just how bad it was and how much better it is today," said one local historian.....
https://www.washingtonpost.com/history/2019/09/21/how-decades-la-smog-led-californias-war-with-trump-over-car-pollution/

Air Pollution Is Killing Millions Around The Globe Each Year -- HuffPost

A thick smog settled over New Delhi as winter began in India last year, forcing medical professionals to declare a public health emergency. Residents swarmed local hospitals complaining of respiratory problems. ....
https://www.huffingtonpost.com/entry/air-pollution-is-killing-millions-around-the-globe-each-year_us_5a1ed396e4b017a311eb9c5f

The Crazy Theory About Smog That's Gaining Ground in the White House

Take a deep breath and read....
http://www.motherjones.com/environment/2017/03/air-pollution-denial-climate-denial

If the EPA head won’t defend EPA regulations, there are people who will

Six states filed a motion Thursday to protect the EPA’s smog rule....
https://thinkprogress.org/if-the-epa-head-wont-defend-epa-regulations-there-are-people-who-will-58f418c0274#.7prbx7bq4