Carbon monoxide is a slow killer as well. It attaches to the hemoglobin on a person's red blood cells in the same way oxygen does, but it clings faster and tighter. With little room for oxygen to attach to hemoglobin on the red blood cells, the body begins to suffer oxygen deprivation. Exposure to small amounts over long periods of time are just as dangerous as exposure to greater amounts over shorter periods. Early warning sighs include vomiting, confusion and heart flutters.
Prevention is key and can be accomplished easily.