The Challenge to Man's Survival

acres American ancient animals areas arms race artificial selection atmosphere atomic automation automobile Barry Commoner become beneath bomb brain Brontosaurus century chemicals cities civilization consequences course creatures damage danger death decline despite destroy destruction diseases earth effects environment evident example existence extinction fact fish forces forests gray whales growth human hydrogen bomb Ibid increase individual industrial industrial revolution insecticides intelligence internal combustion engine land less living man's means menace ment mental military millions mind modern natural natural selection nuclear ocean organs overspecialization peril pesticides plants poisons pollution population possible problem production racial radiation recent revolution Rome scientific scientists selection senescence social society soil Soviet Union specialization species spinescence square miles Stegosaurus survival thousands threatened Thucydides tion United Nations warfare weapons York