Fact 1: Carbon monoxide is a gas produced by furnaces and other devices that burn fuel.

Fact 2: Cabins have wood burning stoves and propane furnaces.

Given the two facts above, answer the question "What gas is produced by burning propane?" with the following options: 
- Greenhouse gases
 - Sulfur dioxide
 - gasoline
 - Carbon monoxide
 - hydrocarbons
 - carbon dioxide
 - dangerous
 - heating liquids


 

    Carbon monoxide     