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population studies (through time (originated - africa, farming and trade -…
population studies
through time
originated - africa
farming and trade - rise in population
1 AD - 170 million not may people for years
eastern empire - Han dynasty 400AD decrease in population due to war
800AD 200 million
1350AD black plague
1400 increase population slave trade
1800 industrial revolution one billion people
1900-2 billion one mother six children
1950- 3 billion
2100 - predicted 11 billion drop one mother three babies
1987 - 5 billion
1999 - 6 billion
2011 - 7 billion
birth and death rates
5 born sec
2 die sec
last 50 years - living longer
10 million live in a mega-city
population
Asia 60%
Singapore 7605 people/km
Manhattan 26,934 people/km
Manila 41,515 people/km
drinking water
13% dirty water