Enough and to Spare: Mother Earth Can Nourish Every Man in Freedom

abundant acres adequate Africa agricultural alunite America annual production Asia attained average Axis powers billion barrels birth rate Britain capital cent century citizens co-operation coal concerning consumption continue copper countries decades democracy democratic deposits earth economic efficient essential estimated Europe fact factors fertilizers figure foreign future geologic Germany human hundred ideas igneous rock increase individual industry intelligent interdependence iron J. D. Bernal Japan kerogen Lake Superior Lake Superior region less live Malthus mankind ment metals million tons mineral fuels mining modern nature nonrenewable resources petroleum phosphate PICTOGRAPH PICTOGRAPH CORPORATION plan for freedom political population possible postwar potential practical present principle processes quantity raw materials regimentation result rocks scientific sedimentary rocks social society soil sources South America Soviet Union square miles supply tion totalitarian trend unmined reserves utilization world organization World War II