What harm does carbon monoxide do to human body?

Carbon monoxide is one of the common pollutants in the atmosphere, commonly known as gas. Colorless, odorless, tasteless, non-irritating, highly toxic, not easy to liquefy and solidify. The main source of carbon monoxide is the product of incomplete combustion of carbonaceous materials. Exhaust gas from industrial furnaces, civil boilers and stoves, as well as internal combustion engines and automobiles are the main sources of carbon monoxide pollution. Among them, carbon monoxide emitted by automobiles accounts for 55%. Carbon monoxide enters the human body through the respiratory tract, causing poisoning. When carbon monoxide poisoning is mild, people will have symptoms such as headache, dizziness, palpitation, nausea, vomiting, weakness of limbs, and even transient fainting. Moderate poisoning, in addition to mild poisoning symptoms, there will be coma or collapse, and the skin and mucosa will be cherry red. Severe poisoning can lead to sudden fainting, which lasts for hours or even days and nights. Often complicated with brain edema, pulmonary edema, myocardial damage, arrhythmia or conduction block, high fever or convulsion, and even death. Survivors of acute poisoning may leave behind various neurological symptoms.