An aquifer is water stored in the _.

A. zone of saturation

B. zone of impermeability

C. zone of aeration

D. Zone of porosity

Suggest two reasons why irrigation is important for human development of the desert (4 marks)

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.

Mengapakah wujudnya perbezaan tanggapan terhadap sumber?