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The food situation worldwide is becoming critical. At present, more than 2 billion humans are malnourished and experience unhealthy living conditions (FAO, 1992a,b; Neisheim, 1993; McMichael, 1993; Maberly, 1994; Bouis, 1995). The number of humans who also are diseased is the largest number ever, and about 40,000 children die each day from disease and malnutrition (Kutzner, 1991; Tribe, 1994). The many problems that are now evident emphasize the urgent need to reassess the status of environmental resources. Based on the evidence, definitive plans must be developed to improve environmental management now and for the future. Of major importance is the limiting and slow reduction of human numbers to better balance the carrying capacity of the earth's natural resources.
Pimentel et al. (Sat,) studied this question.