How could you describe the continental drift theory to someone in simple terms?.

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 benefits does this type of farming have?

What first caused people to consider that the continents were once one large landmass?