Compact fluorescent light bulbs, hybrid vehicles, and led light bulbs are all examples of a recycled materials. b energy-efficient technologies. c conservation inventions. d composting.

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.