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Carbon monoxide is a colourless, odourless and toxic gas that interferes with the body’s ability to transport oxygen by blood. It can leak from anything that burns fossil fuels, including furnaces and exhaust vents for gas appliances, wood burning fireplaces, and exhaust fumes from idling cars. Exposure to low levels of CO can cause flu-like symptoms such as nausea, dizziness, headaches, confusion, fatigue, and shortness of breath. Children, the elderly and people with heart or respiratory conditions may be particularly sensitive to carbon monoxide.
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