The primary objective of biosphere reserves is to contribute to the long-term conservation of biodiversity, protecting its natural resources and the sustainable use of the area. a. true b. false

Dubai is challenged by all of the following environmental factors except a. a warm and dry climate b. a lack of annual rainfall c. scarce freshwater resources d. a lack of valuable natural resources

Describe the four major spheres of the earth system; identify the parts of the earth they each represent. explain what is meant by the "earth system."

The desert expands by hundreds of square miles each year.