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What was the purpose of the first Arbor Day?
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What did Sterling Morton say was unique about the celebration of Arbor Day?
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How had the scale of the Arbor Day celebration changed by 1908?
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What did President Roosevelt say to school children in 1908?
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What was the purpose of the first Earth Day?
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What did Gaylord Nelson say was the most important result of the celebration of Earth Day?
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How had the scale of Earth Day evolved by 1990?
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What do the numbers and variety of Earth Day websites say about the current celebration of Earth Day?
