A) Too much hunting increases the number of animals in forests.
B) Using sewers and treatment plants to remove human waste help in reducing pollution.
C) Carbon black in some aerosols increases the amount of heat reflected back by the earth.
D) Burning coal, petroleum and natural gas releases nitrogen, carbon dioxide and oxygen that trap heat in the earth.
Correct Answer: B
You need to login to perform this action.
You will be redirected in
3 sec