China's smog problem explained
A thick haze has this week smothered Beijing and surrounding areas, with tens of millions of people in northern China under severe pollution warnings.
A thick haze has this week smothered Beijing and surrounding areas, with tens of millions of people in northern China under severe pollution warnings.
Serious pollution is expected to remain over Beijing and surrounding areas until the middle of the month, Chinese state media said Wednesday.
Tens of millions of people across northern China were under severe pollution warnings Tuesday, with authorities urging them to reduce outdoor activities as a grayish smog enveloped the region.
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