Examples from literature

• A gasoline engine should, of course, be located in an outbuilding and the exhaust pipe must extend into open air because of the deadly fumes of carbon monoxide gas. 
• If you run the engine to keep warm, remember to open a window enough to provide ventilation and protect you from carbon monoxide poisoning. 
• No one can for a moment doubt the fact that carbon monoxide is one of the deadliest of poisons. 
• These two poisonous gases, chlorine and carbon monoxide, when mixed together, will not readily unite, but if a ray of sunlight falls upon the mixture they combine at once. 
• Two officers were brought in last night from a sap where they were overpowered by carbon monoxide.