Lecture+8-29-08+TheBigThree

Lecture+8-29-08+TheBigThree - he Big Three: Energy, Water,...

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Unformatted text preview: he Big Three: Energy, Water, and Food Energy, water, food in the context of population growth 世界 2000 4000 6000 8000 10000 12000 B C 4 B C 2 A D 1 2 4 6 8 1 1 2 1 4 1 6 1 8 2 2 2 (million) Billions 1 2 3 4 5 6 7 8 9 10 1950 1970 1990 2010 2030 2050 Less Developed Regions More Developed Regions Source: United Nations, World Population Prospects: The 2004 Revision (medium scenario), 2005. Growth in More, Less Developed Countries Development of World Cities 1950 Data source: U.N. Population Division World Cities exceeding 5 million residents And in the context of increased URBAN populations 2015 World Cities exceeding 5 million residents Data source: U.N. Population Division Development of World Cities Urban Portion of World’s Population 0% 10% 20% 30% 40% 50% 60% 1950 1990 2030 The city of Cairo: close to 20 million, growing about 1 million/year Due both to births and to immigration from rural areas Urban Population Percent 29 15 17 53 47 37 37 76 55 42 74 85 54 61 82 World Africa Asia Latin America and the Caribbean More Developed Regions 1950 2000 2030 Source: United Nations, World Urbanization Prospects: The 2003 Revision (medium scenario), 2004. Trends in Urbanization, by Region Millions Source: United Nations, World Urbanization Prospects: The 2003 Revision (medium scenario), 2004....
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Lecture+8-29-08+TheBigThree - he Big Three: Energy, Water,...

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