how coal was formed ?
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Most of the coal we use now was formed about 300 million years ago, when much of the earth was covered by steamy swamps. As plants and trees died, their remains sank to the bottom of the swampy areas, making layers and layers of plant material and eventually forming a soggy, thick material called PEAT.
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Millions of years ago,when large no.of trees got buried under the earth surface due to natural problems.As more soil deposited over them they were compressed.the Temperature also rose as they sank deeper & deeper.Under high temperature & high preesure dead plants converted into coal.
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