Earth

On October 11, 1999 the world population hit a milestone of how many?

More Questions from Earth
In what direction does the sun set for people on Earth?
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What is the wearing away of parts of the Earth by water or wind called?
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What is a front that does not advance called?
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A 286-mph tornado ripped through what U.S. state?
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What is another name for layers of rock?
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What is not an example of a halide?
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Which of these is the best way meteorologists track big storms such as hurricanes?
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What is the name for the semiarid region that surrounds most deserts?
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