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what state has the most land designated for agricultural purposes?
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Does sand hold heat for a long time in the desert?
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Are there any mountains to ski at in Afghanistan?
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Is there a way to shift the holes in the ozone layer to another part of the world?
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Why is some fog thicker than other fog?
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How many people visit Yosemite every year?
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Is coal mining the most dangerous type of mining in America?
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How much paper average does a person use in a year?
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What is the longest mine shaft in the world?
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How do we tell how much moisture there is in the atmosphere?
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