Describe how materials can be transported by the sea

How are farmers that use no plow farming methods able to improve air quality for the people around the fram

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 is the main source of phosphorus?