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: 
- Heat energy
 - carbon dioxide
 - kinetic energy
 - lowered energy cost
 - sunlight
 - oxygen
 - climate
 - water


 

  carbon dioxide       