What region is most impacted by desertification ? a) kalahari b) gobi c)rainforest d)sahel you sm☺️ need asap❤️

The primary agent of contact metamorphism is

All of the following statements about the biosphere are true except: a. light and heat from the sun do not affect the biosphere. b. the biosphere gets resources from earth's crust, hydrosphere and atmosphere. c. like "biology", the name for the biosphere comes from the greek word for life. d. the biosphere includes all living organisms on earth's surface.

The european union was formally established in