You are presented with the question "What does creating paper do?" and the following answer choices: 
- duplicate itself
 - Makes the air dirtier
 - Makes food
 - Cleans the air
 - converting electricity to heat
 - to move people
 - Plant growth is reduced
 - Lengthens tree life

Now knowing that creating paper requires cutting down trees and trees clean and cool the air, choose the best answer.


 

  Makes the air dirtier       