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December 2009- January 2010 - China.

Lanzhou, capital of the Gansu province, with 3 millions of inhabitants, is one of the most polluted cities of China, and in the world's top 10 for atmospheric pollution due to human activity. The town has a record of pollution, with a TSP (total suspended particules) more than 300% above the chinese government itself maximum recommandations. The whole town is overlaid by a thick lay of polluted dust from car traffic and factories' emissions...
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