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The worst was Xingtai, a city of more than 7 million people south-west of Beijing, which was hit by 129 days of "unhealthy air" or worse – the threshold at which pollution is considered at emergency levels – and more than twice as many days as the capital experienced.
Beijing suffered 60 days of pollution above emergency levels, sparking reports of an "airpocalypse", a boom in sales of air purifiers and masks and measures to tackle the problem including the destruction of open-air barbecues and a crackdown on fireworks for Chinese new year.
Last week, the Chinese premier, Li Keqiang, "declared war" on pollution, saying it was "nature's red-light warning against the model of inefficient and blind development."...
Smog in Harbin, December 2012, shot by Fredrik Rubensson, Wikimedia ommons via Flickr, under the Creative Commons Attribution-Share Alike 2.0 Generic license
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