More food will be required in the next 20 years to nourish more people--at least 7.7 billion are expected by 2020. About 800 million of these people will not have enough to eat, not because world food production is inadequate, but because they lack sufficient resources to produce or purchase the food they require. This greater need for food will aggravate agricultural and urbanization pressures in the developing world, where environmental conditions are expected to worsen before getting better.
Nicholson, Charles F.; Blake, Robert W.; Reid, Robin S.; Schelhas, John. 2001. Environmental impacts of livestock on the developing world. Environment, Vol. 43, Num. 2, 2001, pp. 7-17