The weather gradually turned cold, we are used to close the doors and windows to keep out the cold, at this time if the indoor use of natural gas burning equipment, easy due to the tight amount of room oxygen, resulting in the gas does not fully burn to release a large amount of carbon monoxide. Because carbon monoxide is a colorless, odorless, odorless, non-irritating gas, it produces no special warning signal, so the general people often in the state of self-knowledge poisoning, poisoning light, there will be dizziness, headache, chest tightness, breathing difficulties and other symptoms, serious will lose life or produce permanent brain damage.
