23. Cry Wolf - Prof. Turner The Earth Transformed 11.29.07...

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Prof. Turner The Earth Transformed 11.29.07 I) Cry Wolf 1) Definition a Overstate or oversimplify the problem in order to draw attention to it b In global change, “cry wolf” commonly involves the magnification of environmental damage–the amount or rate of change–or implications of the change 2) Past examples a Extreme (i) Doomsday assessments/predictions of Cassandra’s about food and resources in the 1960s: Club of Rome, Ehrlich’s “population bomb” (ii) China, India, Bangladesh, and other countries were declared “dead.” (iii) China and India are now exporters of food b Subtle (i) Estimates by David Pimentel of global soil loss to erosion of 17t/ha/yr Pimentel 1995 claimed world soils would soon be lost due to erosion, citing rates of loss at 17t/ha/yr! Based on one study of one farm, extrapolated to whole country and then to one continent The data on which such claims were based have been rejected by specialist, including the original study author New evidence indicates that almost all eroded soils are distributed only
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This note was uploaded on 04/24/2008 for the course GEOG 180 taught by Professor Turner during the Fall '08 term at Clark University.

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23. Cry Wolf - Prof. Turner The Earth Transformed 11.29.07...

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