Earth
What type of energy sources can't be replaced readily within a 30-year span?
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To which island group do Kwajalein and Eniwetok belong?
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What famed rock is 1396 feet high, 2.75 miles long, and .25 miles wide?
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What chamber do divers go into to prevent a diving sickness called "the bends"?
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In the United States, in which month does spring begin?
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Mary Anning was the first to discover complete fossils of which prehistoric marine reptile?
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