GS101 Lecture Notes - Food Security, Overfishing, Petrochemical Industry

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10 Sep 2013
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Malthusian trap: idea that human beings can"t increase population and standard of living at the same time. The limits of growth, the basic limits, increase agriculture it will be eaten away from population growth. Malthus wrong about british growth, 1800"s population and standard of living both increasing. Great escape": global population and per capita energy consumption. To escape people were tapping into new sources of energy (fossil fuels, and coal, etc. ) Fossil fuel enabled people to escape malthusian trap. Uses of fossil fuels include: electricity, transportation, petrochemical industry (16% of petroleum used for petrochemicals) Humans represent 0. 5% of global biomass yet estimates of human appropriation of terrestrial. Npp range from 20% to 40% (facilitated by growth of fossil fuels) Outcomes of use of fossil fuels, and energy use species extinction 6th great species extinction in planetary history, prior changes caused by natural events this one is caused by humans.

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