Fact 1: Using renewable resources to generate power reduces greenhouse gases.

Fact 2: Carbon dioxide is a greenhouse gas.

Given the two facts above, answer the question "what does using renewable resources to generate power reduce?" with the following options: 
- lowered energy cost
 - solar power
 - climate
 - evergreen trees
 - Heat energy
 - oxygen
 - carbon dioxide
 - kinetic energy


 

       carbon dioxide  