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Chapter Page 1 The Earth Answers Back
Energy from Earth to Man
As Mank1nd Th1nketh
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acres Africa agriculture Alfred Korzybski American animals arable land areas Asia biotic potential bushels carrying capacity cent chernozem Chile China climate continent corn crop cultivated culture decades destroyed destruction Dust Bowl earth ecological economic El Salvador environment environmental resistance eroded Europe European excessive famine farm farmer feed fertility floods forest grasslands grazing Greece guano gully human hundred hydrologic cycle important increase India industrial Japan Latin America less living standard ment Mexican Mexico millions modern natural North numbers organic overgrazing overpopulated Peru plant cover popu population possible probably problem production protect Puerto Rico rain rainfall rapidly reduced region relationship result rich rivers Salvador savanna scientific slopes Soil Conservation soil erosion Soviet species square miles standard of living survival thousand timber tion topsoil tropical United Valley vegetation water tables watersheds wealth western wheat wildlife wind