Why do so many volcano and earthquake line up on a map of earth?

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.

True or false.the baltic states have taken steps to diversify. or decrease the variety of their industries

The graph below plots the temperature and luminosity of stars on the main sequence.