Pamphlets on Conservation of Natural Resources, Volumen18U.S. Government Printing Office, 1909 |
Dentro del libro
Resultados 1-5 de 100
Página 233
... supply of resources we now need and will continue to need for generations to come . This can be done in several ways ... supplies of copper may be ex- hausted in less than a century , and of petroleum in less than a century and a half ...
... supply of resources we now need and will continue to need for generations to come . This can be done in several ways ... supplies of copper may be ex- hausted in less than a century , and of petroleum in less than a century and a half ...
Página 235
... supply more than a quarter of our energy needs . There is only a finite quantity of both rock and air , but it is inconceiv- able that the supply will ever be exhausted - although here and there man has replaced breathable air with smog ...
... supply more than a quarter of our energy needs . There is only a finite quantity of both rock and air , but it is inconceiv- able that the supply will ever be exhausted - although here and there man has replaced breathable air with smog ...
Página 237
... Supplies ; Agricultural Lands ; Forests and Grass- lands ; and Animal Life . In your discussions of any problem ... supply in view of demand ? 3. What major factors are involved in its optimum use ? ONE Fresh Water Supplies Without ...
... Supplies ; Agricultural Lands ; Forests and Grass- lands ; and Animal Life . In your discussions of any problem ... supply in view of demand ? 3. What major factors are involved in its optimum use ? ONE Fresh Water Supplies Without ...
Página 238
... supply of fresh water except by desalting sea water , a process which at the present time is prohibitively expensive for practical use in most areas . Because our water resources are both renewable and mobile , the avail- able supply at ...
... supply of fresh water except by desalting sea water , a process which at the present time is prohibitively expensive for practical use in most areas . Because our water resources are both renewable and mobile , the avail- able supply at ...
Página 239
... supply comes to us mostly via the natural channels of the land- scape - via streams and water bearing formations . We should not fail to realize , then , that the use the land receives certainly affects water sup- ply . A most important ...
... supply comes to us mostly via the natural channels of the land- scape - via streams and water bearing formations . We should not fail to realize , then , that the use the land receives certainly affects water sup- ply . A most important ...
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Términos y frases comunes
acres agencies Agriculture annual areas bill boys Bureau CAGNEY camp Chairman Civilian Conservation Corps Commission committee Congress conservation movement Construction cooperation coordination cost Council delinquency Department Douglas-fir economic enrollees existing facilities Federal Government fire Forest Fire forest land FOREST PROTECTION Forest Service forestry Gifford Pinchot Governor habitat important improvements increase industry Insect and Disease interest Interior January 26 juvenile Kalamazoo River labor legislation Maintenance Management and administration ment miles million acres mineral national forests national-forest natural resources organization parks percent plans planting population present President problems production proposed recommendations recreation Reforestation regional resource development Resource Management Resources and Conservation responsibility river roads and trails Senator CLARK Senator Humphrey SENATOR MURRAY Senator RANDOLPH Silviculture statement streams surveys Theodore Roosevelt Timber purchasers tion U.S. Senate United utilization Washington watershed welfare wildlife young Youth Conservation Corps