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overpopulation (why high birth rates (income, 5000, niger + chad, 6-7…
overpopulation
why high birth rates
income
5000
niger + chad
6-7 children
poverty
children assets
social security
workers extra income
no pensions
uneducated
traditional role housewife
effect
Overcropping
planting same crop year after year
soil infertile
cash crops Chad
peanuts,cotton,groundnuts
no crop rotation
no fallow year
monoculture
rapid population growth
cause
stage 2 population cycle
high birth rates
50 million 2011
Niger Birthrate 52 Per 1000
Sahel
19 million 1960
deathrate 14 per 1000
niger natural increase 38 per 1000
famine
cash crops
planted before food crops
famine 2010
20 million affected
deep ploughing
PEDS broken up
organic matter buried
topsoil blown away