what causes carbon monoxide poisoning
Carbon monoxide poisoning is caused by breathing in carbon monoxide (CO) gas produced when fuels like gas, oil, wood, coal, or charcoal burn without enough oxygen, leading the gas to build up and replace oxygen in the blood. This usually happens in enclosed or poorly ventilated spaces, especially when fuel- burning appliances or engines are faulty, misused, or used indoors.
What carbon monoxide is
- Carbon monoxide is a colorless , odorless, tasteless gas produced by incomplete combustion of carbon-based fuels.
- Because the human senses cannot detect it, people can be exposed for a long time without realizing there is a problem.
How it causes poisoning in the body
- When inhaled, carbon monoxide binds tightly to hemoglobin in red blood cells to form carboxyhemoglobin, blocking oxygen from attaching and being carried to tissues.
- This leads to tissue hypoxia (lack of oxygen), especially affecting the brain and heart, and at higher levels can cause loss of consciousness, organ damage, or death.
Common household and indoor sources
- Faulty or poorly maintained gas boilers, furnaces, water heaters, gas or paraffin space heaters, and gas cookers can leak carbon monoxide.
- Wood, coal, or gas fireplaces and stoves, portable generators, and other fuel-burning appliances used in enclosed or semi-enclosed spaces can also generate dangerous CO levels.
Dangerous misuse and situational causes
- Running vehicles, lawn mowers, or other gasoline-powered tools in garages or near enclosed spaces allows exhaust to accumulate and cause poisoning.
- Using barbecues, camping stoves, or portable propane equipment indoors or in tents, as well as exposure to smoke in a structure fire, are well-documented causes.
Risk factors and when it’s more likely
- Cold weather months see more cases because people rely more on heating appliances, and faulty or unvented heaters in closed rooms increase CO buildup.
- Homes without working carbon monoxide detectors, older or poorly maintained appliances, and situations where ventilation is blocked (like clogged chimneys or snow-blocked car exhausts) carry a higher risk.
If carbon monoxide exposure is suspected (for example, sudden headache, dizziness, nausea in more than one person in the same space), everyone should move into fresh air immediately and emergency services should be contacted.
Information gathered from public forums or data available on the internet and portrayed here.