A massive 80% drop in traffic on California’s normally jam-packed roads has contributed to significantly cleaner air. 9News
A study released Monday, by Xiao Wu and Rachel C Nethery of Harvard University, also linked exposure to PM 2.5 to an increased risk of death from Covid-19.PM 2.5 ends up in our air from many sources, but Zhu said vehicle traffic is a big contributor in Southern California.
The massive drop - in one of the most traffic-choked states in the country - is likely a big reason for the cleaner air. The coronavirus has forced many of the world's biggest countries to restrict people's movements, and similar declines in air pollution have been observed around the world -- from India and China, to the US and Europe.
Unfortunately, the reduced pollution is probably temporary. As lockdowns lift and commutes to work resume, LA's air quality is likely going to decline again.
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