US news organisation CNN reports LA saw some of the cleanest air of any major city in the world, according to IQAir, a Swiss air quality technology company which also monitors pollution levels in cities around the globe. Beginning early last month, Environment Protection Agency (EPA) air quality data shows that the city of Angels experienced its longest stretch of “good” air quality since at least 1995.
Professor Yifang Zhu, of environmental health sciences at UCLA’s Fielding School of Public Health, said that she and her colleagues had identified a similar trend. Between March 16, three days before California Governor Gavin Newsom ordered the state’s 40 million residents to stay home, and April 6, Professor Zhu’s team found there was a 20 per cent improvement in overall air quality in Southern California.
Professor Zhu’s team also found a 40 per cent drop in levels of PM 2.5, a class of microscopic air pollutants that have been linked to serious cardiovascular and respiratory problems, especially in children and the elderly. Since California’s stay-at-home order went into effect, Professor Zhu’s team has found that traffic across the state has fallen by around 80 per cent. The massive drop, in one of the most traffic-choked states in the country, is likely a big reason for the cleaner air.
Source: Econews
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