Carbon Monoxide Poisoning
Carbon monoxide (CO) is a tasteless, odorless and colorless gas. Carbon monoxide is present when fuel is burned in engines, furnaces and open fires. Fuels that can produce CO when burned include gasoline, wood, coal, natural gas, propane, oil and methane. Breathing high levels of CO causes CO poisoning, which can cause severe illness or even death is just minutes. For this reason, CO is often referred to as an invisible killer.