file · Web viewPoorest affected - 250 mil people / 1 bil - at risk of food shortage....
Transcript of file · Web viewPoorest affected - 250 mil people / 1 bil - at risk of food shortage....
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Desertification - Process of land chang-ing from farmable, pro-ductive land into desert
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Cause 1 - Cattle Over-grazing - animals eat too much plant life
Movement of cattle compacts soil
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Large # of animals feeding in one area —> complete loss of vegetation
Cause 2 - Deforestation — cutting of trees
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Loss of vegetation & roots that stabilize the ground
Result: Soil not able to absorb H2O easily - flood-ing possible
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Reason for cutting trees - fuel, heating, cooking
Increased population —> increased cutting
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Shade removed - soil in direct sunlight
Soil temp increases - H20 leaves soil
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Salination of soil = salt content increases
Result: soil becomes useless
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Result: Estimated total money lost each year from desertification = 42$ bil
Appx. 50 mil people dis-placed - next 10 years
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Mass migration
Each year - 6 mil. hectares of farmable land —> de-creased food production
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Increased prices of food - due to loss of farmable land
Poorest affected - 250 mil people / 1 bil - at risk of food shortage
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Dec. food prod. —> in-creased food prices, esp. staples like wheat, rice, corn
Ex: wheat cost up 130% in 2008
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Poor countries - no money to prod. food - cannot af-ford imported food
Global effects of De-sertification