THE DESTRUCTION OF THE FOREST. 85 



air, while the removal of the forest tends to permit 

 Budden changes in such temperature. 



These effects will be considered under the gen- 

 eral head of climate. 



The axe of the pioneer, so often regarded as the 

 emblem of civilization, is more correctly to be 

 regarded as an emblem of an entirely different 

 character. 



The problem of the preservation and protection 

 of the forest is one of extreme difficulty, for the 

 following reasons : 



The dense populations which now exist in most 

 of the temperate regions of the earth could not 

 continue to exist in the forest regions which once 

 grew on large parts of their areas. 



The regions best fitted for the growth of men 

 are also best fitted for the growth of trees. Since 

 civilized man cannot continue as a dweller in the 

 forest, as the density of population increases, the 

 forest must be cut down. 



In removing the forest to make way for man, 

 certain areas should be set aside in all sections 

 for the purpose of perpetually maintaining trees 

 thereon. The nature of such areas will, of course, 

 depend on a variety of circumstances. In general, 

 however, it can be shown that, on the slopes of 



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