NASA has released imagery from January 10th and 11th showing the massive extent of smog coverage over Beijing and much of the nearby area. Visibility on the ground was reduced to about two hundred yards (about 180 metres) as tens of thousands of square miles were covered in smog.
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| On January 10th smog covered much of the North China Plain |
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| On January 11th winds changed and the smog was blown away |
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