Earth

What is the hard, dark substance found in the ground that is mined for fuel?

More Questions from Earth
What country forms a 2000-mile archipelago along the east coast of Asia?
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What is the sediment left behind after a glacier moves through an area called?
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Which pairs of minerals are almost always found together?
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A weather proverb says: "Clear moon," followed by what?
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What is the low pressure area along the equator called?
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What is the common name for the Cenozoic Era?
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Abnormally warm weather in autumn is called what?
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What layer of the Earth's atmosphere contains the ozone layer?
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