What important quality does the ionosphere have?
what is exosphere?
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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

Which region was the hearth for the largest number of agricultural animals such as pigs sheep and cows