Caixin
Jan 08, 2019 06:54 PM
ENVIRONMENT

China’s Smog Keeps Clearing

A man wearing a face mask rides an escalator to cross an overpass in Beijing on Dec. 19. Photo: VCG
A man wearing a face mask rides an escalator to cross an overpass in Beijing on Dec. 19. Photo: VCG

China’s air quality improved again in 2018, with the average levels of a key pollutant dropping by 9.3% in the 338 cities included in data released Monday (link in Chinese) by the Ministry of Environment and Ecology.

One of the ways in which air pollution is measured is by the concentration of PM2.5 — hazardous particulate matter under 2.5 micrometers in width — given as micrograms per cubic meter. Major sources of PM2.5 include burning coal, emissions from heavy industry, and emissions from cars and trucks.

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