In a series of undisturbed rock layers where shale lies between sandstone below and limestone above, the a) limestone is youngest. b) shale is youngest. c) sandstone is youngest. d) beds are all the same age.

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.

What distinguishes monsoon asia from the remainder of asia? what are the consequent differences between the two?

How has the geography of india made it difficult for its people to expand before modern technology?