Man and His Environment

acid Africa agriculture America animals anthropoid apes areas Asia associated australopithecines bacteria become bipedal birth rate body bones brachiators Britain calcium carbohydrates causes chemical coal concentrations countries crops cycle death rates deficiency density deposits diet digits discharged disease distribution ecosystem effects effluents energy environment Eocene estuary Europe factors feeding fertility fish forests fossil groups growth hominid Homo erectus human increase industrial intake lack lemurs limbs living lower mammals million Miocene modern mortality natural Neanderthal nitrogen occur Oligocene organisms oxygen Paleocene pattern period pesticides plants Pleistocene pollution pongid population primates problems produced Propliopithecus prosimians protein Ramapithecus reduced regions relatively remains result river sewage skull soil species square mile Steinheim sulphur dioxide surface survival Swanscombe tarsiers teeth temperature Thames thumb tion tissues tons Torrey Canyon toxic tree shrews tropical vegetation vitamin Wales wastes whilst World monkeys