Earth

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

More Questions from Earth
When does magma become lava?
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Which type of irrigation is most commonly used throughout the world?
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What is the cooler air rushing down a mountainside called?
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What storm produces lightning?
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Which of these habitats describes the North Pole?
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What forms when water condenses in the Earth's atmosphere?
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The science term "weather vane" is best defined as which of these?
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What magnitude did the largest recorded earthquake in the United States reach?
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