You are presented with the question "Gases released during the use of what causes global warming?" and the following answer choices: 
- coal
 - CO 2
 - Globe shaped cake warming
 - CO2
 - oil
 - CFCs
 - Warming plates
 - Paper Mache Globe making

Now knowing that gases released during the use of fossil fuels causes global warming and oil is a fossil fuel, choose the best answer.


 

     oil    