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actually, coal itself does not pollute the Earth, only when it is lit on fire does it pollute, that is because coal produces smoke, which contains carbon dioxide and possibly carbon monoxide too, so the trees collect carbon dioxide to turn it into oxygen and when the other chemicals also pass through the tree it kills the tree some, a tree is living so it will die, and no trees equals no oxygen which equals again, no humans

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Q: How does coal pollute the world?
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