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Unformatted text preview: Population and the Environment – Chapter 9 Links growth and food supply, resource depletion, and the environment Local, regional, global levels – varies from place to place Impact of Early Civilizations Small scale impact = low Fire = .5 million years ago Tools for hunting, farming Advent of agriculture --- population growth --- development of towns and cities --- alteration of landscape Deforestation & Desertification – over the millennia in parts of the world Forests of Near East & Europe; N. Africa (Egypt); Mesopotamia --- salinization; wind erosion – all irrigated landscapes. Arizona – Hohokam? Air Pollution Early American Indian slash and burn Thermal inversions on a mini-scale Water unhealthy drinking situations Dirty open canals – early urban areas – filthy and unsanitary Snow’s study on cholera in England As population increases, so does environmental degradation Pollution Crowding and violence (competition) Global warming and ozone depletion Deforestation Decreasing ecological diversity Overgrazing How fast can Earth absorb toxins?...
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This note was uploaded on 01/23/2010 for the course GCU 73578 taught by Professor Larson-keagy during the Fall '09 term at ASU.
- Fall '09