Coal is an important resource that is used to create heat,energy and electricity.
1.Coal is made largely of carbon but also features other element such as hydrogen,oxygen,sulfur and nitrogen.
2.Coal is the world's largest source of energy for the production of electricity.
3.Nearly 70% of China's electricity comes from coal.In total ,coal produces around 40% of the world's electricity.
4.The use of coal is increasing every year .
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