, the world population growth ..
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World Population Balance - sustainable world and US population
Yet none of these measures will be sufficient to ensureadequate food supplies for future generations unless the growthin the human population is simultaneously curtailed. Severalstudies have confirmed that to maintain a relatively highstandard of living, the optimum population should be less than200 million for the U.S. and less than 2 billion for the world(Pimentel et al., 1994). This assumes that from now until anoptimum population is achieved, strategies for the conservationof land, water, energy, and biological resources are successfullyimplemented and a sound, productive environment is protected.
WOA! World Population Awareness
RS and NAS. 1992. "The Royal Society and the NationalAcademy of Sciences on Population Growth andSustainability." Population and Development Review 18 (2) :375-378.
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