How do the plains of Canada support the people & the economy?

Identify the type of chemical reaction involved in each action.

Why are shark population in decline worldwide?

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.