Which physical feature has most limited the movement of people living in north africa

Explain why components that are naturally found in air can be considered air pollutants.

Iceland has taken advantage of its geology to meet a. political needs b. energy needs c. cultural needs d. economic needs answer b. energy needs

What is the term for a government where power is carefully divided between a central government and several regional or provincial governments? a.) unified or central government b.) federal government c.) confederate government d.) republican government