Population2 - Population: Part II 12 11 10 9 Old Stone Age...

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Population: Part II A.D. 2000 A.D. 1000 A.D. 1 1000 B.C. 2000 B.C. 3000 B.C. 4000 B.C. 5000 B.C. 6000 B.C. 7000 B.C. 1+ million years 8 7 6 5 2 1 4 3 Old Stone Age New Stone Age Bronze Age Iron Age Middle Ages Modern Age Black Death —The Plague 9 10 11 12 A.D. 3000 A.D. 4000 A.D. 5000 1800 1900 1950 1975 2000 2100 Future Billions Source: Population Reference Bureau; and United Nations, World Population Projections to 2100 (1998). Thinking about Population In 1900, the earth supported 1.6 billion people (1/5 China) By 2000, the total had quadrupled (6.0 Billion) [1/5 China] Most of the surge took place post-1950 Nothing like this had ever happened, nor is it likely to ever again The growth rate has fallen irregularly ever since it peak at about 2.2% Demographers expect the growth rate to slow to zero by 2050 or 2070 What might happen after that is anyone’s guess.
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Why the extraordinary burst? Transfers of successful death control measures (public health, nutrition, medicine) • Before 1914, effective public health systems existed in only a few regions • After 1950, vaccinations, antibiotics, sanitation measures and the fruits of other scientific research cut death rates everywhere • World wide, most progress in death control took place between 1945 and 1965 World Life expectancy – 1800 (less than 35yrs) – 1900 (about 35yrs) – 1950 (about 45yrs) – 2000 (67yrs) Declining Mortality
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This note was uploaded on 10/12/2008 for the course GEOG 1004 taught by Professor Staff during the Fall '07 term at Virginia Tech.

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Population2 - Population: Part II 12 11 10 9 Old Stone Age...

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