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What role did the waterways of europe play in development of europe's economy

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.

Pollution from one country can affect another. for example, south korea is especially affected by pollution and dust storms that come from