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human activity (overgrazing (60 million cattle (60million), soil bare, sun…
human activity
overgrazing
soil bare
sun dries soil
cattle eat grass/roots anchor soil
blown away wind
60 million cattle
60million
culture
wealth/ status
number of cattle own
move place to place
nomadic tribes
cycle continues
drink water,cut down trees
all resources gone
eat all grass
move somewhere else
The Sahel
below the Sahara desert.
area of grassland
North Africa 4500 km long
pastoral farming
desertification
Sahara 5-15 km
every year
spread of the desert
farmers burn cow dung/heat
less humus for soil