EESA01H3 Lecture Notes - Fertile Crescent, Improved Sanitation, Sahelanthropus
1 Nov 2012
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Population: a root cause of environmental degradation: much of the environmental degradation in the world is due to: Wide misuse and overuse of resources by too many people. Ipat(s) model: 1974: paul ehrlich and john holdren, total impact (i) on environment is a result of the interaction between population (p), affluence (a), technology (t), and sensitivity (s): Technology = increased exploitation of resources or ways of better dealing with our need for resources. Sensitivity = how sensitive an area is to human pressure. Impact is largely pollution, resource depletion, or both. The first humans: oldest known homonid (human-like) fossils: Doubling time: the number of years it takes, given a specific rate of increase, for a number (such as population) to double. 1979 china growth rate = 2. 8% (popl"n at time: 1b) Current global growth rate = 1. 2% (now: ~6. 9b) Current canada growth rate (natural and net immigration together) = 0. 9% (now:
