2

3

4

5

6

7

8

9

10

GlobalPopulationGrowthSource:UnitedNationsPopulationFund

1927

1960

19741986

1999

20112025*

2043*

2083*

Year(*indicatesestim

ate)

0 2 4 6 8 10 12PopulationinBillions

14% 30% 50% 70%

GlobalUrbanizationTrendsSource:PopulationReferenceBureau

1800 1900 1950 2008 2050*Year(*indicatesestimate)

0%

10%

20%

30%

40%

50%

60%

70%

80%

PercentageofG

lobalPopulationLivinginCities

33% 51%