The Last Days of Mankind: Ecological Survival Or Extinction |
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Page 152
... population came back from its low point of 25 to something over 50 . But even under protected status a wild bird is occasionally shot , and the species is still right on the danger line , that line of minimum population that makes ...
... population came back from its low point of 25 to something over 50 . But even under protected status a wild bird is occasionally shot , and the species is still right on the danger line , that line of minimum population that makes ...
Page 196
Ecological Survival Or Extinction Samuel Mines. So things are moving faster , like the population increase . From the time of Christ it took about 1,600 years for the population to double . Now it is doubling about every 30 years , and ...
Ecological Survival Or Extinction Samuel Mines. So things are moving faster , like the population increase . From the time of Christ it took about 1,600 years for the population to double . Now it is doubling about every 30 years , and ...
Page 225
... population , almost one - fourth the population of the world . ” In India , Pakistan , Iran , Iraq and Mexico , says the paper , some mosquitoes have developed resistance not only to DDT but also to the insecticides replacing it ...
... population , almost one - fourth the population of the world . ” In India , Pakistan , Iran , Iraq and Mexico , says the paper , some mosquitoes have developed resistance not only to DDT but also to the insecticides replacing it ...
Contents
An Introduction | 9 |
Rivers Dams and Floods | 27 |
Water Pollution and the Great Water Shortage | 49 |
Copyright | |
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acres Agriculture Alaska alligators American animals bill birds building California Canyon cars chemical Congress conservation conservationists cost cougars created Creek damage decibels Department dieldrin Disney dumped East Meadow ecology Engineers environment Environmental estimated Everglades Everglades National Park expressway Federal feet fish flood Florida Forest Service gallons Governor harp seal Hickel highway Hudson hunters increased industry insecticides insects Interior Island jetport killed Lake Lake Okeechobee Lake Powell lumber companies miles million Mineral King mountain National Forest National Park natural Okeechobee oxygen Park Service percent pesticides plankton plant pollution population pounds predators problem proposed public lands recreation redwood reservoirs river road salmon Save-the-Redwoods League says Secretary Sequoia National Park sewage Sierra Club species spraying square miles stream supply timber tion traffic trees Udall Valley Vällingby wild wilderness wildlife wood York