The world's population has more than doubled in the last fifty years.

1950 = 2.5 billion people
2002 = 6.2 billion people
2050 = 8-9 billion people

60% lives in Asia
14% lives in Afrika
9% lives in South America
9% lives in Europe
5% lives in North America
2% lives in Russia
1% lives in Oceanie (a.o. Australia)