In the winter, the risk for carbon monoxide poisoning is at its highest, because it’s almost always related to the heating systems. Although some governments in Canada have taken regulatory actions on carbon monoxide, fatal accidents still occur, that is why it is extremely important to understand some facts about carbon monoxide (CO). CO is an odourless, colourless and tasteless gas that can cause sudden illness and death. CO is found in combustion fumes, such as those produced by cars and trucks, small gasoline engines, stoves, lanterns, burning charcoal and wood, and gas ranges and heating systems. CO from these sources can build up in enclosed or semi-enclosed spaces. Breathing it can poison people and animals in these spaces. Because CO is basically undetectable to the human senses, people may not know that they are being exposed. The initial symptoms of low to moderate CO poisoning are similar to the flu (but without the fever). They include: headache, fat...