Chinese meteorological authority has issueda yellow alert for fog indicating dangerous levels of smog in China’s northern and western regions, including major cities like Beijing and Chengdu. It saidparts of China were facing the worst recorded pollution.
A news agency quoted Beijing Municipal Environmental Monitoring Center website saying the density of PM2.5 particulates had surpassed 700 micrograms per cubic meter in many parts of the city. The World Health Organization considers a safe daily level to be 25 micrograms per cubic meter.
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