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Importance of Arid Lands in the Global Economy W G Matlock
Desert Economies S Joekes H Singer and J Swift
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activities Africa agriculture albedo Algeria animals annual arid and semi-arid arid areas arid lands arid regions arid zone Arizona Botswana Bushmen California California Desert cattle changes climate coastal desert and/or countries crops cultivation depletion desert and/or arid desert areas desertification drought dunes ecological economic ecosystems energy environmental erosion Euphrates factors farming feddans grazing ground water growth habitat hectares human important increase industrial Iran Iraq irrigation Kalahari Kalahari Desert labour Libya livestock major maps Mauritania ment Mesopotamia million mineral mining NADSAT natural resources nomadic pastoral pastoralists percent planning plants population potential present problems production projects rainfall Rajasthan range result river runoff Sahara Sahel salinity sand Saudi Arabia sector semi-arid settlement social soil sources species strategy supply surface temperature tion tourism Tunisia types United University of Arizona urban vegetation wildlife