Smog in north-east China grounds flights
This article is more than 12 months old
BEIJING Heavy smog suffocated north-east China for a fifth day yesterday, with hundreds of flights cancelled and road and rail transport grinding to a halt in low-visibility conditions.
More than 20 cities have entered a state of red alert since Friday evening, implementing emergency measures aimed at cutting emissions and protecting public health.
Levels of PM 2.5 - harmful microscopic particles - climbed to 844 in the area, according to the website aqicn.org. The number is almost 34 times the World Health Organisation's recommended maximum exposure level of 25 over a 24-hour period. - AFP
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