13. IPAT - Prof. Turner The Earth Transformed 10.18.07 I)...

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Prof. Turner The Earth Transformed 10.18.07 I) Global Change In Mass Consumption Contemporary Nature-Society Dynamics 1) Population [2007] a About 6.7 billion people now b 9.5 billion projected 2050 c Percentage of this 6.7 billion 57% live in Asia 21% live in Europe 14% live in Western Hemisphere 8% live in Africa 51% female 70% non-white 66% non-Christian 1% college educated 6% have ½ of all wealth 2) Understanding GEC a Moving beyond “history” of human-induced change to “understanding” the causes of change b Ozone or Aral sea cases demonstrate the narrative explanation details of understanding c The “science” explanation the search for general properties of the problem (i) Axiom: greatest proportion of explained variance with the least number of factors = most elegant 3) The IPAT Identity a Impact (Environmental) = P x A x T b Population (i) Number units of consumption [biological need] c Affluence (i) Per capita level of consumption [wealth] d Technology (i) Efficiency of production [energy] 4) What is an identity? a
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13. IPAT - Prof. Turner The Earth Transformed 10.18.07 I)...

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