Where is songhai ghana and mali in africa

Which of the following is not a challenge to instituting sound global environmental policies? a. most changes are inexpensive and easy to implement. b. elected leaders who support unpopular environmental issues often are not re-elected. c. economic considerations outweigh environmental ones in many societies. d. there is no way to enforce international environmental agreements.

Landmasses on a flat map look distorted because

Based on current rates the earths human population is expected to grow how much by 2050