Exponential Growth 2011 - 1 Population Growth 2: Population...

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Unformatted text preview: 1 Population Growth 2: Population explosions Video 1: ZPG : Population Clock Video 1: ZPG : Population Clock A brief history of Homo sapiens First records: 400,000 YA Radiations: 50,000 YA Humans reached Australia, New Zealand, N. America, New Guinea 12,000 YA: origins of agriculture and animal domestication Video 2: National Geographic Population 7 Billion Video 2: National Geographic Population 7 Billion 2 1 out of every 9 people who ever lived on the earth is alive today! 1 out of every 9 people who ever lived on the earth is alive today! * 1 Billion ( 1800 ) 1 Billion ( 1800 ) 9 Billion! ( 2050 ) 9 Billion! ( 2050 ) Minimum Requirements Minimum Requirements Food 1 acre Water 2 acres Food 1 acre Water 2 acres ~ ~ 3 What has fueled rapid population growth? Power of exponential growth Factors affecting growth of human population Limits to growth? Exponential growth Explosive, unlimited growth Malthusian growth Rev. Thomas Malthus ( An Essay on the Principle of Population 1798) Net increase always proportional to population size and a constant growth rate Exponential law: the...
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This note was uploaded on 10/04/2011 for the course ECOL 1000 taught by Professor Altizer during the Fall '08 term at University of Georgia Athens.

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Exponential Growth 2011 - 1 Population Growth 2: Population...

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