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China's web users say this time, it's #TheMostSeriousSmog - BBC News
The chronic air pollution currently afflicting northern China is being described by social media users as the worst they have experienced. Red alerts have been issued, highlighting the severity of the problem, and traditional media - which often shy away from reporting about the recurring scourge - say it needs urgent action.
China's web users say this time, it's #TheMostSeriousSmog - BBC News
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