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Land

Land. How do we use it?. Land that is covered with buildings and roads. Urban. City – Definitions vary 5,000 people per square mile. U.N. estimates by 2025, 67% of world population will live in urban areas. Rural. Land that contains relatively few people and large areas of open space.

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Land

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  1. Land How do we use it?

  2. Land that is covered with buildings and roads. • Urban • City – Definitions vary • 5,000 people per square mile • U.N. estimates by 2025, 67% of world population will live in urban areas. • Rural • Land that contains relatively few people and large areas of open space.

  3. Land Use in the United States Urban – 6% Cropland – 20% Rangeland – 26% Forest – 28% Parks – 13% Other – 7% 46% for food production

  4. Where We Live • Before 1850: Mostly rural, subsistence farmers • After 1850: Shift to urban centers • Urbanization – The movement of people from rural areas to cities • Why do people move from the country to a city:? • 1980: 75% of U.S. population classified as urban • Urban people rely on rural areas for sustenance

  5. Ecosystem Services • The resources produced in rural areas that urban populations depend on • Oxygen • Water • Food Production • Trees for Construction, Paper • Minerals for Manufacturing

  6. Megalopolis • The region from Boston to Washington D. C. • One extended urban center • 4 of the 7 largest metropolitan areas • Boston, NYC, Philly, D.C. • First described in 1961 • Greek for “Very Large City” • Population 44,000,000 • 16% of U.S. population

  7. Megalopolis

  8. World’sLargestUrbanAreas • 1. Tokyo, Japan - 34,100,002. Mexico City, Mexico - 22,650,0003. Seoul, South Korea - 22,250,0004. New York, United States - 21,850,0005. Sao Paulo, Brazil - 20,200,0006. Mumbai, India - 19,700,0007. Dehli, India - 19,500,0008. Los Angeles, United States - 17,950,0009. Shanghai, China - 17,900,00010. Jakarta, Indonesia - 17,150,00011. Osaka, Japan - 16,800,00012. Kolkata, India - 15,550,00013. Cairo, Egypt - 15,450,00014. Manila, Philippines - 14,850,00015. Karachi, Pakistan - 14,100,00016. Moscow, Russia - 13,750,00017. Buenos Aires, Argentina - 13,400,00018. Dhaka, Bangladesh - 13,100,00019. Rio de Janeiro, Brazil - 12,100,00020. Beijing, China - 11,950,000

  9. Urban Crisis • When a city grows faster than the infrastructure can support. • Urban Sprawl – The rapid expansion of a city into the countryside • Development of marginal lands

  10. Heat Island • Urban areas are hotter than surrounding rural areas • Ave. 1.8o-5.4o • Up to 22o at night • Impacts: • Increased energy consumption • Increased air pollution • Compromised human health and comfort • Impaired water quality

  11. Public Land • 650,000,000 acres • 30% of land in U.S.

  12. National Parks • 84,000,000 acres • Yellowstone - 1872 • Recreation, conservation • 275,000,000 visitors • 392 parks, monuments, seashores, national recreation areas, battlefields, historic monuments, rivers

  13. National Wildlife Refuges • 92,000,000 acres • 48,000,000 visitors • 300 refuges • Conservation • 98% of all people in U. S. live within a 1 hour drive of a NWF

  14. Bureau of Land Management • 253,000,000 surface acres • 700,000,000 subsurface acres • 13% of land in U.S. • 40% of federal land • Commercial use • Mining • Grazing • Recreation

  15. National Forests • 193,000,000 acres • Texas • Commercial use, recreation • Forests and grasslands

  16. Bureau of Indian Affairs • 55,000,000 acres Department of Defense • 30,000,000 acres

  17. The Palm Islands

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