•over farming and overgrazing on marginal lands • extended droughts in the sahel region • wind erosion of topsoil these situations have all contributed to (1) population growth in southwest asia (2) deforestation in south america (3) desertification in sub-saharan africa (4) increased reliance on fossil fuels in asia

The Sahel is located on the African continent between the Atlantic Ocean and the Red Sea. Because of its long periods of scarcity of rain and semi-arid pasture, land desertification generates in this area.

The agriculture, overgrazing, overpopulation of marginal lands and soil erosion contribute to deep desertification in the region.