In the American Lung Association‘s annual “State of the Air” report released in April 2018, eight of the USA’s ten cities with the worst air pollution are in California. According to the USA Today write-up on the report, “about 133 million Americans — more than four of 10 — live with unhealthful levels of air pollution, placing them at risk for premature death and other serious health effects such as lung cancer, asthma attacks, cardiovascular damage and developmental and reproductive harm. ‘We still have a lot to do in this country to clean up air pollution,’ said Lyndsay Moseley Alexander, director of the Association’s Healthy Air Campaign. The report looked at pollution levels from 2014 to 2016. Ozone pollution was worse overall in this report than it was in last year’s report.”
On the Report Card, Mountain View is not listed by Santa Clara gets a C rating for Particulate Pollution and an F for Ozone Pollution.
USA Today quotes Lung Association President and CEO Harold P. Wimmer in explaining that “near record-setting heat from our changing climate has resulted in dangerous levels of ozone in many cities across the country, making ozone an urgent health threat for millions of Americans.” Smog forms on warm, sunny days and is made worse from chemicals that exit vehicle tailpipes and from power plant and industrial smokestacks. Warmer temperatures make ozone more likely to form. “This adds to the evidence that a changing climate makes it harder to reduce ozone pollution and protect human health,” Alexander said.