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US History Ch. 27

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Across
2
Legislation designed to reduce smog and air pollution in large American cities
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Developed four laws of ecology with which growing numbers of people agreed
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Wanted to create a nature reserve 100 miles in diameter in New York's Adirondack Mountains
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Could lead to melting of polar ice caps and flooding of coastal areas
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Belief that nation's resources should be used wisely
Down
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Studied ways in which ecological systems change over time