More blue skies seen last year

Average air quality improved in 2018, as comprehensive controls 'worked'

China saw improvements in air quality last year, with another drop in the number of smoggy days recorded, the top environmental authority said on Monday.

In 2018, the average concentration of PM2.5 - particulate matter 2.5 microns or less in diameter that can be dangerous to humans - in 338 cities in China had been reduced by 9.3 percent from 2017 levels, reaching 39 micrograms per cubic meter, according to the Ministry of Ecology and Environment.