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

Fact 2: Chlorofluorocarbons are greenhouse gases.

Given the two facts above, answer the question "Using renewable resources reduces what?" with the following options: 
- Heat energy
 - energy usage
 - massive damage
 - chlorofluorocarbons
 - direct damage to the lungs
 - Temperature
 - deforestation
 - scarce resources


 

    chlorofluorocarbons     