Aug 15 - Coal is used to produce 40 percent of the world's electricty, most of its steel and the cement in its buildings and shows no sign of losing popularity. It is made of old organic matter which ...
Coal is considered to be one of the most important fossil fuels. The global stone coal output in 2018 was approximately 7 billion metric tons. 1 China, USA, Russia and India mine a huge amount of the ...
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