Pollution:
Technological Disasters:
Population and Land-Use Issues:
Sustainable versus Industrial Agriculture:
Early Conservationists/Preservationists:
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Politicians/Civil Servants
(Pro- and Anti-Environmental Protection):
Resource Depletion:
"Natural" Disasters:
Biotechnology:
Appropriate Technology:
Governmental Policy:
More Recent Conservationists/Preservationists:
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Agriculture (Sustainable and Industrial):