Air pollution in northern Chinese city surpasses WHO guideline by 100 times


In Shijiazhuang, capital of northern Hebei province, levels of PM 2.5, fine particulate matter, soared to 1,000 micrograms per cubic meter, state-run Xinhua News Agency reported on Monday. That compares with a WHO guideline of an annual average of no more than 10 micrograms.

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