CO is called the “Invisible Killer” because it’s a colorless, odorless, poisonous gas. Breathing in CO at high levels can be fatal. Know the symptoms of CO poisoning Source: Consumer Product Safety Commission Because CO is odorless, colorless, and otherwise undetectable to the human senses, people may not know that

Store flammable items like oil, gasoline, paints, propane and varnishes in a shed away from your home.