Pamphlets on Conservation of Natural Resources, Volumen18U.S. Government Printing Office, 1909 |
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Página 250
... millions . For purposes of this discussion we have taken 220 million as being a reasonable estimate of the population of the United States by 1975 . This would represent an increase of 55 million over our present ( 1955 ) numbers , or ...
... millions . For purposes of this discussion we have taken 220 million as being a reasonable estimate of the population of the United States by 1975 . This would represent an increase of 55 million over our present ( 1955 ) numbers , or ...
Página 257
... millions of acres that once supported magnificent forests now bear only inferior trees of small stature . And the forest acreage of the country shrank from more than 900 million acres to about 600 million . By the early 1900's it became ...
... millions of acres that once supported magnificent forests now bear only inferior trees of small stature . And the forest acreage of the country shrank from more than 900 million acres to about 600 million . By the early 1900's it became ...
Página 292
... million . By 1950 it had risen to 150 million , a 25 % increase in 20 years . The latest estimates for 1959 are that our population is now 178 million - an 18 % % increase since 1950 . Now we can see why the American economy generates ...
... million . By 1950 it had risen to 150 million , a 25 % increase in 20 years . The latest estimates for 1959 are that our population is now 178 million - an 18 % % increase since 1950 . Now we can see why the American economy generates ...
Página 332
... million tons . In other words , about a ton per person . The next day another newspaper equally reliable indicated that the annual consumption was 61/2 million tons . The figure appears actually to be some 300 to 400 pounds per capita ...
... million tons . In other words , about a ton per person . The next day another newspaper equally reliable indicated that the annual consumption was 61/2 million tons . The figure appears actually to be some 300 to 400 pounds per capita ...
Página
... million , making the total cost of fire control approximately $ 38,449,500 . Cooperation in the suppression of forest fires began under the Weeks Law of 1911 and was greatly strengthened in 1924 by the Clarke - McNary Act . The initial ...
... million , making the total cost of fire control approximately $ 38,449,500 . Cooperation in the suppression of forest fires began under the Weeks Law of 1911 and was greatly strengthened in 1924 by the Clarke - McNary Act . The initial ...
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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