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It is vain to provide for the needs of ages the technological abilities of which we cannot even dream.Human Actionp. 383; p. 386Environment
Man is the only animal that is able, within definite limits, to adjust his environment purposively to suit him better.The Ultimate Foundation of Economic Sciencep. 8Environment
Talk about the magnificence of untouched nature is idle if it does not take into account what man has got by desecrating nature.Theory and Historypp. 218-19Environment
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