What are the three main features that separate commercial farming from subsistence agriculture?

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.

Southeast asia relies on its many because of the volcanic, mountainous terrain. a. highways c. rivers b. airports d. lakes

How does australia influence people