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Pennsylvania colony governer Wlliam Penn ordered colonist to conserve one tree for every five cut down.
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Hunting in the Yellowstone National PPark was illegal.
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Raker Act was passed because of the flooding of Hetch Hetchy Valley and the building of O'Shaughnessy Dam, in Yosemite National Park.
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Heavy smog affected the air which caused the city officials to close Los Angeles schools.
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Water pollution was a problem because of that President Johnson sighned the Water Quality Act.
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Congress are trying to keep animals from getting extinct,so they passed the Endangered Species Act.
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NASA warned Congress of the effects of global warming
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The Earth Summit held in Rio de Janerio,was to pledge control over global warming.
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Julia Butterfly Hill 25 years old lived for 735 days in a 180 ft tall California Redwood Tree and kept it from getting destroyed.
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Congress wanted to regulate air pollution and emissions so they created a new act.
