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Teddy Roosevelt and John Muir (founder of the Sierra Club) fought to preserve that people use the forest too much. Gifford Pinchot (director of U.S. Forest Service) believed that forest should be used and renewed to maintain a flow of resources for human use and to conserve the environment.
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1914 Aldo Leopold writes A Sand County Almanac: argues that nature is not our servant and keeping balance is our ethical responsibility toward environment.
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Rachel Carson writes about effect of pesticides and eventually Federal Government bans pesticides.
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Establishment of Greenpeace got more media coverage and people became more responsible in taking care of it.
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Chernobyl nuclear power plant exploded and killed estimated 60, 000.
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People kept producing carbon dioxide by burning of fossil fuels such as coal and oil, and thus kept warming climate of the planet
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Bangladesh Poribesh Andolon which is a civic movement was launched with a view to protect the environment from being exploited
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Environmentalists in Bangladesh raised a protest against the Rampal coal-fired power plant project near the Sundarbans to safeguard the ecology of the largest mangrove forest.