every question need a reference What makes one dune more stable than another? paragraph What human interferences destroy dunes? paragraph What is the difference between eustacy and isostacy?paragraph How is Las Vegas planning to deal with the lack of water?paragraph · What is desertification? How has it affected West Africa? What policies would you implement to prevent desertification in the United States? paragraph · Describe one effect that humans have had on the physical geography of the Earth. Is this a beneficial or detrimental effect? Why? paragraph
