There are three main methods of dying via carbon monoxide inhalation: running your car in the garage, lighting charcoal with all the windows shut, or staying in an enclosed area with fire. It is possible that you will fall asleep from the carbon monoxide before it prevents oxygen from reaching the brain and killing you. Keep in mind, however, that if you don’t die, you can have short term effects such as dizziness, loss of consciousness, nausea, breathlessness, and headaches. Long term effects include brain damage and paralysis.