Carbon monoxide poisoning causes [[Types of Hypoxia#Hypemic Hypoxia|hypemic hypoxia]] and is incredibly dangerous. Carbon monoxide is in exhaust fumes, which means that if exhaust fumes are able to enter into the cabin it could be easily inhaled. Carbon monoxide is colorless, odorless, and tasteless, meaning that you will not be able to tell if you are inhaling it. Combining that with the difficulty in identifying symptoms of hypoxia, it can easily become fatal. # Blood Oxygen Monitor Errors While blood oxygen monitors can generally be used to gauge the onset of hypoxia, they can run into errors when measuring the hypoxic effects of carbon monoxide.