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

Fact 2: Hydropower is a renewable resource.

Given the two facts above, answer the question "What does hydropower help reduce?" with the following options: 
- deforestation
 - Greenhouse gases
 - enormous damage to homes
 - salinity
 - energy usage
 - flooding
 - massive damage
 - Temperature


 

  Greenhouse gases       