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.
Many people know that carbon monoxide is a toxic gas. It is colorless, odorless, and tasteless. Carbon monoxide can be produced from the incomplete combustion of hydrocarbons when oxygen supply is insufficient. Town gas contains 3% of carbon monoxide. If there is gas leakage, carbon monoxide poisoning may occur. Do you know why is carbon monoxide so dangerous? Because carbon monoxide has much higher tendency to bind with hemoglobin in blood than oxygen does.