Historical Examples. 1  But this is insecure ground, and the meaning can but be guessed at. 2  He realized that his tenure was insecure, and he dreaded exposure. 3  Her foot slipped from its insecure rock hold and she stumbled. 4  He left her with the feeling that the foundations70 of life, as she was leading it, were insecure.
Carbon monoxide poisoning is caused by inhaling combustion fumes. When too much carbon monoxide is in the air you're breathing, your body replaces the oxygen in your red blood cells with carbon monoxide. This prevents oxygen from reaching your tissues and organs. Various fuel-burning products and engines produce carbon monoxide.
The Dangers of Carbon Monoxide Poisoning from a Furnace. Your furnace is a heating system that produces carbon monoxide (CO), a silent and harmful gas that can be fatal. You need to be diligent about regular furnace maintenance in order to keep your family safe from the dangers of carbon monoxide poisoning. Your unit needs to remain efficient and safe at all times.