Man – supposedly the most intelligent creature of a species-rich biosphere – has collectively painted himself into a corner: a problematical future of existential dimensions.
Human activities disrupt the life-critical ecological balances. All human life needs food, which in turn requires earth, water, energy and air. In essence, human beings need the earth, but earth actually does not need us.
http://yaleglobal.yale.edu/display.article?id=8225
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