The primary danger with carbon monoxide is that it cannot be easily detected. Carbon monoxide is a colorless, odorless, tasteless gas, and thus gives its victims no advance warning. Commonly referred to as "coal gas" or "white damp," carbon monoxide comes from the incomplete burning of gasoline, wood, coal, oil, propane gas, or anything else that contains carbon. The poisonous gas consists of just two elements, carbon and oxygen, and mixes readily with air. Poisoning occurs entirely from inhalation of the toxic compound from the air.