Crust and lithosphere refer to the same layer of the earth. select the best answer from the choices provided
a. true
b. false

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?

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