The Environment of America: Present/ Future/ Past: Selected Articles from a Variety of Sources ...Thomas C. Jones J. G. Ferguson Publishing Company; distributed to the book trade by Doubleday [New York, 1971 - Conservation of natural resources - 324 pages |
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Page 132
... lead con- tent over that gap is almost zero . Dr. Patterson has examined a number of such samples and his findings with respect to their year - by - year content of the element lead are re- markable . In the graph ( Fig . 1 ) we see the ...
... lead con- tent over that gap is almost zero . Dr. Patterson has examined a number of such samples and his findings with respect to their year - by - year content of the element lead are re- markable . In the graph ( Fig . 1 ) we see the ...
Page 133
... lead . It is a chemical combination of the elements lead , carbon , and hydrogen . It was found that addition of less than 1 % by volume of this compound to gasoline the octane rating could be raised by as much as fifteen octane points ...
... lead . It is a chemical combination of the elements lead , carbon , and hydrogen . It was found that addition of less than 1 % by volume of this compound to gasoline the octane rating could be raised by as much as fifteen octane points ...
Page 134
... lead . In Figure 2 the graph shows the total of tetraethyl - lead used since 1920 . At first its use was small ; however , by the late 1940's its annual increase is more and more marked . In total from 1920 to 1970 over 5 mil- lion tons of ...
... lead . In Figure 2 the graph shows the total of tetraethyl - lead used since 1920 . At first its use was small ; however , by the late 1940's its annual increase is more and more marked . In total from 1920 to 1970 over 5 mil- lion tons of ...
Contents
America the Beautiful | 8 |
a Faithful Steward? | 25 |
An Environment Fit for People | 44 |
Copyright | |
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acres agencies agricultural air pollution alewives American animals areas become birds Bureau chemical cities coastal zone Commission conservation continue Creek crops dance earth ecological economic effects environment environmental farmers Federal feet fertility fish grouse growth human hundred hunter increase Indians industry insecticides insects INTERIOR killed Lake Michigan lake trout lamprey land lead leafhoppers lindane living major marine ment miles million minerals NATIONAL COAL ASSOCIATION National Forest NATIONAL PARK NATIONAL PARK SERVICE natural beauty ocean organisms percent pest pesticides pigeons planning plants POLLUTION CONTROL population prairie present problems production protection rainbow trout recommend recreation regions river scientists sea lamprey SOCIETY OF COLORADO soil species streams timber tion trees trout U.S. DEPT U.S. FOREST SERVICE United UPI COMPIX urban waste water pollution Whooping Crane wild wildlife woods