Carbon monoxide (CO) is a clear, odorless and tasteless gas. It’s created by partial fuel combustion often caused by not enough oxygen. In your house, appliances that consume natural gas, charcoal, wood or kerosene are vulnerable. Especially if they are not operating properly or have been installed improperly.
Vehicle exhaust fumes from nearby garages, as well as fireplaces that aren’t working right may also create carbon monoxide. CO is dangerous to the body and is deadly at high levels or with long exposure.