Name and explain what occurs when earth's plates crash into one another.

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.

Acontinental polar air mass foms in

How can minerals crystallize from materials dissolved in water? check all that apply.