More than half of the world's production of coal comes f

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More than half of the world's production of coal comes from

U.P.P.C.S. (Mains) 2006

[Earth - Tropics, Volcanoes, Tides, cyclones, Corals ETC. Part 8]

U.S.A. and Russia

China and U.S.A.

China and India

South Africa and Australia

...

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