What are the two nomadic tribes in sahara desert​

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.

Where is the world’s shortest commercial runway?

What border separates sonora and chihuahua national border state border physical boundary natural boundary