How Many People Can the Earth Support?
In this penetrating analysis of one of the most crucial questions of our time, a leading scholar in the field reviews the history of world population growth and gives a refreshingly frank appraisal of what little can be known about its future. In the process, he offers the most comprehensive account yet available of how various people have tried to estimate the planet's human carrying capacity. Few contemporary writers have addressed the issue of world population growth in such a balanced, objective way, without using it as a pretext to advance a prior political agenda.
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Africa agricultural American animal annual Asia assumed assumptions average billion hectares biological birth rate calculations calories century Condorcet constraints consumption contraception costs crops cubic kilometers cubic meters cultivation culture death rates decline demographic demographic transition developing countries diet doomsday equation Earth economic economist Ehrlich energy environment environmental equation estimates example exponential factors Figure fraction fresh water future global population growth grain grow hectare human carrying capacity human population Ibid increase infection inputs irrigation kilocalories per day kilograms land less limit logistic curve logistic equation Malthus Malthusian parameter maximum migration natural Penck percent person plants poor countries population density population growth rate potential population prediction problems projections regions Resources Institute 1992 rise social soil species square kilometer square meters supply tion tonnes total fertility rate United Nations values women World Bank world population World Resources Institute World3 yield
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The Environmentalism of the Poor: A Study of Ecological Conflicts and Valuation
No preview available - 2002