arbon monoxide is a poisonous gas that has no smell or taste. Breathing it in can make you unwell, and it can kill if you’re exposed to high levels.
Every year there are around 60 deaths from accidental carbon monoxide poisoning in England and Wales.
After carbon monoxide is breathed in, it enters your bloodstream and mixes with haemoglobin (the part of red blood cells that carry oxygen around your body) to form carboxyhaemoglobin.
When this happens, the blood is no longer able to carry oxygen, and this lack of oxygen causes the body’s cells and tissue to fail and die.