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he wrote The Earth as Modified by Human Action: Man and Nature.
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Father of Our National Park System
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game managment
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Forest Reserve Act of 1891
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developed a quantitative theory of the damage suffered by living cells when they were frozen and thawed at slow or moderate rates
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Fundamentals of Ecology
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was built on top of 21,000 tons of hazardous chemical waste Read more: Gibbs, Lois Grassroots Environmental Activist and The "Mother of Superfund" (1951–) - EPA, chemicals, industrial, toxic, power, health http://www.pollutionissues.com/Fo-Hi/Gibbs-Lois-Grassroots-Environmental-Activist-and-The-Mother-of-Superfund-1951.html#ixzz1XBYwN2ki
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On Human Nature (1978)
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essential contribution towards finding alternative solutions to energy problems
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Anne H. Ehrlich
Her scientific contributions, individually and jointly with Paul have extended Paul R. Ehrlich
His development of the powerful concept of co-evolution (with Peter Raven) was an important contribution to understanding the dynamics of animal populations. These ecological and evolutionary principles were later applied by the Ehrlichs to help assess the impact of human populations on the environment. His 1968 book, The Population Bomb, was the wake-up call for an entire generation.