They are sometimes called smoke odor exterminator candles, smoke eater candles, and smoke eliminator candles because they are made to remove smoke smells from cars, homes, clothes pretty much anything that has been exposed to smoke
Tobacco smoke contains a poisonous gas called carbon monoxide, which binds to haemoglobin and reduces the amount of oxygen your blood can carry
Paul Aveyard, Professor of Behavioural Medicine at the University of Oxford, said the study has confirmed a suspicion amongst epidemiologists that light smoking carries a "substantial risk for heart disease and stroke." However, he also said it would be wrong to conclude that there is no point in cutting down
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The 0.5mg figure comes from the emissions, which is the vapour each stick produces, and tends to be substantially lower than the nicotine content of the raw tobacco before its heated