ENVS 1126 Lecture Notes - Lecture 7: Resource Depletion, Zero Population Growth, Ozone Depletion
20 Nov 2016
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Document Summary
The industrial revolution: birth of modern science and technology: 1700"s and 1800"s. The green revolution (1940"s to 1960"s: concerns over producing food for the larger population led to increased agricultural efficiency, pesticides, irrigation, and fertilizer increased yields, countries could feed their growing populations. Industrialized agriculture came at significant costs: erosion, soil and water pollution, loss of native plants, resources (soil, water) were used faster than they were replaced. It takes more grain to feed an herbivore than to feed a carnivore because so much energy is lost at each rise in the trophic level of the biomass pyramid. 3% of the wealth: the poorest of the poor are extremely bad off. If tfr = 2. 0: the population is stable. Different populations, different problems: a formula accounting for human factors contributing to environmental deterioration and resource depletion is i = p * a * t, environmental impact (i) equals population (p) * affluence and consumption (a) *
