Often called the silent killer, carbon monoxide (CO) is an odorless, colorless gas created when fuel (such as gasoline, wood, coal, natural gas, propane, oil, and methane) burn incompletely.
In the home, heating and cooking equipment that burn fuel can be sources of carbon monoxide.
A person can be poisoned by a small amount of CO over a long period of time or by a large amount of CO over a shorter amount of time.