ENV200H1 Lecture Notes - Lecture 3: Sustainable Development, Overexploitation, Resource Depletion
14 Mar 2016
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Env science: how the natural world works, how env afects us & we afect our env: challenges. Same as science never absolute truth just beter approximaions, tentaive. Earth"s natural income: solar capital (sun), natural capital (earth) Living sustainability: living of earth"s natural income without depleing natural capital that supplies it, implies we have shared responsibility of earth"s inite resources. Measured by: ecological footprint: the amount of producive land & ocean needed to provide populaion with food, energy, materials, water, waste disposal. Divide area of earth available to support us by size of global popl. Current average footprint = 2. 7 hectares per person. So we"re using more resources than earth produces per year: impact on env = populaion x consumpion x tech (i = p x a x t) Roadblocks to living sustainably = economic ineria, & human nature of greed. Steady state economy: stable/ mildly luctuaing popl & consumpion, birth rates = death rates, saving/ investment = depreciaion.
