PLANTS, ANIMALS, AND HUMANS 423 
taken assumption that one may be independent of the rest, might 
cause an irreparable maladjustment. 
Any intensification of the utilization of wild plants and ani- 
mals or any increase in the cultivation and breeding of domestic 
plants and animals, beyond the natural or improved possibilities 
of the environment, can be dangerous. In turn, any unplanned 
population increase will immediately make greater demands on 
the natural resources, which can be satisfied only at the risk of 
grave consequences. 
