Fact 1: Burning fossil fuels increases the carbon in the atmosphere.

Fact 2: More carbon in the atmosphere means atmospheric warming.

Given the two facts above, answer the question "what increases when fossil fuels are burned?" with the following options: 
- Greenhouse gasses
 - Greenhouse gases
 - cancer
 - wood ash
 - atmospheric warming
 - coal
 - heat energy
 - Temperature


 

     atmospheric warming    