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.
Low levels of carbon monoxide can cause flu-like symptoms, headaches, dizziness, and make it difficult to think clearly. Often a family may not realize that their illnesses are related to chronic exposure to carbon monoxide in the home.