desertification
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reforestationafforestationariddroughterosionsoilclimateenvironmentecologydegradationovergrazingdeforestationsalinizationwastelandsanddustwindprecipitationrainfallwaterirrigationagriculturefarmingpasturesavannasteppesahelbiomeecosystembiodiversityvegetationflorashrubgrasslandhumidityevaporationtemperaturewarminggreenhousecarbonemissionsustainabilityconservationrestorationreclamationlandslidesiltationnutrientmineralhumustopsoilariditydrynessbarrensterileoasisaquifergroundwaterdesertdunesemi-aridclimate changeglobal warmingenvironmentalismhydrologygeologypedologymeteorologyoverpopulationresourcescarcityfamineyieldcultivationtillagemulchingterracingwindbreakxerophytesucculentevapotranspirationland useanthropogenic