What gases are given off when you burn a candle?

Candles produce gases that can, in large amounts, cause environmental damage. But a candle, or even several hundred, will have very little effect compared with the burning of other hydrocarbons.

Carbon Dioxide....needed by plants, but too much increases the greenhouse effect.

Water vapour...can contribute to the green house effect

Carbon monoxide...Toxic to human and animal life, adds preferentially to red blood cells in stead of oxygen.

Unburnt hydrocarbons..only trace amounts but can have a "greenhouse" effect

CO2, water vapour and probably a bit of carbon monoxide. CO2 is a greenhouse gas, but the amount produced from burning a candle is insignificant. Carbon monoxide is poisonous, but again not in the amounts produced by a candle.

CO2; plants need it for photosynthesis but obviously too much of something turns bad

carbon dioxide