Smoking is a heavy burden on the NHS and is the cause of about 1 in 5 deaths.

The Telegraph reports that smoking costs the NHS more than 5 billion pounds a year and is the cause of 1 in 5 deaths in Britain. This "does not include indirect costs such as informal care, the costs of treating disease caused by passive smoking and the full range of conditions associated with smoking."

Speaking from my own experience, both of my parents smoked, and I had long spells in hospital and spent much of my childhood coughing...)o:

If you are a smoker, you do harm others by your smoking, even if you try not to believe this.