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Coal is a non-renewable fossil fuel and supplies 27 per cent of the world's energy. Geologists study rocks to find coal. Coal can be dug from near the surface or deep underground.
Credits: Associated Press
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Coal is a non-renewable fossil fuel and supplies 27 per cent of the world's energy. Geologists study rocks to find coal. Coal can be dug from near the surface or deep underground. Credits: Associated Press |
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