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75% water 25% land ½ is too dry or too cold for large-scale agriculture 75% of world population lives along a river or a coastline... or 5% of the land.

Published byGilbert Dorsey Modified over 9 years ago

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Presentation on theme: "75% water 25% land ½ is too dry or too cold for large-scale agriculture 75% of world population lives along a river or a coastline... or 5% of the land."— Presentation transcript:

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2 75% water 25% land ½ is too dry or too cold for large-scale agriculture 75% of world population lives along a river or a coastline... or 5% of the land area ½ of a ½ of a ¼ Or...

3 POPULATION Population concentrations 1. EAST ASIA 2. SOUTH ASIA 3. EUROPE 4. SOUTHEAST ASIA 5. NORTHEAST NORTHAMERICA

4 POPULATION Population density Arithmetic density # people total land area = Longwood University campus – 7,994 students/sq. mi. D. Hardin

5 POPULATION Population density Physiologic density # people total arable land = Agricultural density # people total farmed land = D. Hardin

6 POPULATION Population density Carrying Capacity: The ability of a given amount of land To support a given number of people At a given level of technology D. Hardin

7 POPULATION Population density D. Hardin Egypt 2011 Population – 80,410,017 Total Land Area – 390,117 sq. mi. Arable Land – 12,873 sq. mi. (3.3%) Farmed Land 1,950 sq. mi. (0.5%) Arithmetic Density 206 persons/sq. mi. (just a bit higher than Virginia) Egypt

8 POPULATION Population density D. Hardin Physiologic Density: 6,246 persons/sq. mi. Egypt Agricultural Density: 41,236 persons/sq. mi.!

9 POPULATION Population change D. Hardin TP = OP + B – D + I - E Total Population Original Population BirthsDeaths Immigra- tion Emigra- tion Natural Population Change Migration

10 POPULATION Population change D. Hardin Rates of change Highest – Niger: 3.52% Lowest – Moldova: -0.68% World average – 1.1% (down from 1.2%) It’s all in the numbers. Take two countries with identical growth rates (.42%)… Grenada: 105,303 X.42% = 442 people annually China: 1,353,600,687 X.42% = 5,685,122 people annually World: 7,072,887,517 X 1.1% = 77,801,762 people annually That’s 70% of the population of Virginia every year! That’s nearly 10 Virginias every year!

11 POPULATION Population change D. Hardin 20002050 20002050

12 POPULATION Demographic Transition Time Birth rate Death rate Total population Stage 1Stage 2 Stage 3 Stage 5 D. Hardin Stage 4

13 POPULATION Population Pyramids D. Hardin

14 POPULATION Demographic Transition & population pyramids Time Birth rate Death rate Total population D. Hardin Stage 1

15 POPULATION Demographic Transition Stage 1 D. Hardin

16 POPULATION Time Birth rate Total population Stage 1Stage 2 D. Hardin Death rate Demographic Transition & population pyramids

17 POPULATION Demographic Transition D. Hardin Stage 2 Nigeria Libya Iraq 2003

18 POPULATION Demographic Transition Stage 2 D. Hardin [Youth serves the Fuhrer]

19 D. Hardin Industrial Revolution Medical Revolution Hans Rosling video POPULATION Demographic Transition Stage 2

20 POPULATION Demographic Transition Time Birth rate Death rate Total population Stage 1Stage 2 Stage 3 D. Hardin

21 POPULATION Demographic Transition D. Hardin Stage 3 Israel India Egypt

22 POPULATION Demographic Transition D. Hardin Stage 3

23 POPULATION Demographic Transition D. Hardin Stage 3

24 POPULATION Demographic Transition D. Hardin Stage 3

25 POPULATION Demographic Transition D. Hardin Stage 3

26 POPULATION Demographic Transition Stage 3 2000s 1980s 1990s 1970s Brazil

27 POPULATION Demographic Transition Stage 3 NUMBER OF CHILDREN IN THE LAST THREE GENERATIONS Percentage

28 POPULATION Demographic Transition Time Birth rate Death rate Total population Stage 1Stage 2 Stage 3 D. Hardin Stage 4

29 POPULATION Demographic Transition D. Hardin Stage 4 United States Australia Canada

30 D. Hardin Social Security decreases poverty among the elderly… Per capita Social Security expenditures and poverty rate for 65+, 1959-2009 …while allowing seniors their independence… …and creating the nuclear family. POPULATION Demographic Transition Stage 4

31 POPULATION Demographic Transition Time Birth rate Death rate Total population Stage 1Stage 2 Stage 3 Stage 5 D. Hardin Stage 4

32 POPULATION Demographic Transition D. Hardin Stage 5 Japan Germany Switzerland

33 POPULATION Demographic Transition D. Hardin Germany Stage 5 1972 WW I Hitler’s baby boom WW II Stage 2 moving to Stage 3

34 POPULATION Demographic Transition D. Hardin Germany’s “Guest Workers” Stage 5

35 POPULATION Demographic Transition Stage 5 D. Hardin Germany’s “Guest Workers”

36 POPULATION Demographic Transition Stage 5 D. Hardin Germany’s “Guest Workers”

37 POPULATION Demographic Transition U.S. population pyramids D. Hardin

38 POPULATION Demographic Transition Ageing U.S. population D. Hardin

39 POPULATION Demographic Transition Ageing U.S. population D. Hardin

40 Voter Turn-out by Age, 1976-2008 POPULATION Demographic Transition Ageing U.S. population D. Hardin ?

41 POPULATION Population change D. Hardin TP = OP + B – D + I - E Total Population Original Population BirthsDeaths Immigra- tion Emigra- tion Natural Population Change Migration

42 D. Hardin POPULATION "Give me your tired, your poor, Your huddled masses yearning to breathe free, The wretched refuse of your teeming shore. Send these, the homeless, tempest-tossed to me. I lift my lamp beside the golden door." Migration Immigration

43 D. Hardin POPULATION Average Migrant Profile Young – average in the 20s (age most willing to do hard, distasteful work) Educated – average some high school; the best and brightest coming to US (“brain drain”) Motivated – decision to migrate is more than the average person is willing to risk; willing to endure hardship so their children will have better lives (“American Dream”) Migration Immigration

44 D. Hardin POPULATION Migration Immigration Population Pyramids for Hispanic Citizens and Immigrants in Virginia, 2006

45 United States Mexico San Diego San Ysidro Tijuana D. Hardin POPULATION Migration Immigration U.S.-Mexico border

46 D. Hardin Migration POPULATION Hispanic population: US

47 Migration POPULATION Hispanic population: nativist fears D. Hardin

48 Migration POPULATION Hispanic population: VA D. Hardin 199020002010 Region of Birth for Virginia’s Foreign Born

49 Migration POPULATION Hispanic population: VA D. Hardin

50 Migration Internal POPULATION D. Hardin

51 POPULATION D. Hardin Migration Internal

52 POPULATION D. Hardin Migration Internal

53 POPULATION D. Hardin Migration Political geography

54 D. Hardin POPULATION Migration Political geography Gerrymandering

55 D. Hardin POPULATION Migration Political geography Redistricting in Virginia 2011

56 POPULATION Demographic Transition Time Birth rate Death rate Total population Stage 1Stage 2 Stage 3 Stage 5 D. Hardin Stage 4

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