Fact 1: Recycling has a positive impact on the environment.

Fact 2: Recycling means reusing things.

Given the two facts above, answer the question "what has a positive impact on the environment?" with the following options: 
- temperature
 - reusing things
 - a hydraulic system
 - water conservation
 - peachleaf willow
 - density
 - Green beans
 - addition


 

  reusing things       