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A coking factory - coal firing power station complex belches exhaust into the air in Linfen, Shanxi Province, China on Thursday, 03 December, 2009. Due to the heavy presence of coal mines and related industries, Linfen was named the world's most polluted city from 2004-2007.
A coking factory - coal firing power station complex belches exhaust into the air in Linfen, Shanxi Province, China on Thursday, 03 December, 2009. Due to the heavy presence of coal mines and related industries, Linfen was named the world's most polluted city from 2004-2007.