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Page 173
series of natural checks upon the endless number and variety of forms of life , a fairly even balance is maintained . But man , in providing for the wants of a complex and highly artificial civilization seriously disturbs this nattural ...
series of natural checks upon the endless number and variety of forms of life , a fairly even balance is maintained . But man , in providing for the wants of a complex and highly artificial civilization seriously disturbs this nattural ...
Page 177
It being impossible to ascertain whence he had secured his plants , extensive explorations were made by Mr. Marlatt , of the Department of Agriculture , in order to find the natural habitat of the pest , as it was anticipated that its ...
It being impossible to ascertain whence he had secured his plants , extensive explorations were made by Mr. Marlatt , of the Department of Agriculture , in order to find the natural habitat of the pest , as it was anticipated that its ...
Page 190
But experience has shown that people generally , when they have a chance to make money rapidly by exploiting a great natural resource , have not the slightest hesitation in destroying it utterly and for all time to come .
But experience has shown that people generally , when they have a chance to make money rapidly by exploiting a great natural resource , have not the slightest hesitation in destroying it utterly and for all time to come .
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