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So what are we actually smoking?

In discussion of its effects on health, smoking always seems to mean the smoking of ready-made cigarettes (Topic of the week: smoke-free Scotland, Letters, December 2).

Has there been any research to differentiate between this and the smoking of pipes, cigars or roll-ups? Or to compare the effects of different methods of cultivation such as organic as against the use of artificial fertilisers and pesticides?

Contextual targeting label: 
Health

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