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Northern China gripped with heavy air pollution
Severe air pollution alert issued in North China
Heavy Smog Brings Travel Chaos to China
Air pollution in China shortens lives
China Pollution: Huge areas enveloped by storm
Beijing targets steel mills to cut air pollution
New Sandstorm Hits Northern China, Reducing Visibility, Air Quality
Severe air pollution alerts issued for wide area in north China
Thick air pollution fog blankets Chinese capital
CHINA AIR POLLUTION
Beijing Gripped with Severe Air Pollution
China Smog Alert: Beijing and Tianjin have issued orange alerts
