The sun is seen behind smoke billowing from a chimney of a heating plant in Taiyuan, Shanxi province December 9, 2013. A coal-dependent manufacturing base has made China the world's biggest contributor to climate change, while high and rising local air-pollution levels have sparked widespread complains from the public nationwide. REUTERS/Stringer (CHINA - Tags: ENVIRONMENT POLITICS ENERGY) CHINA OUT. NO COMMERCIAL OR EDITORIAL SALES IN CHINA - GM1E9C91FTL01
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