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In cigarettes, the fuel is tobacco, which we supply with heat mainly in the form of an open flame from a lighter, or a match, while oxygen is in the air

Just one cigarette butt per litre of water can be highly toxic to fish, their research suggests

A study shows that over five years, the average nicotine strength in an e-cigarette increased from 1.7% to 5%, which is double the amount of nicotine you inhale from a pack of cigarettes

Among Swedish men, rates of lung, lip and oral cancer, as well as oesophageal and stomach cancers, have reduced considerably since 1980

Epigenetics Maternal smoking in pregnancy has also been associated with epigenetic modifications, including DNA methylation, that are implicated in deleterious changes to gene expression and processes related to growth and development [48, 49]