The British Medical Association (BMA) said the "important study" confirmed that passive smoking kills.

BBC: NEWS | Health | Cancer alert for smoking parents

If people do not know what will make them happy (just as if they do not realise that smoking kills or calories fatten) governments could helpfully tell them what might.

ECONOMIST: Economics focus

Smoking kills around 430, 000 Americans a year, but in many cases the link with death is hard to prove: for instance, a smoker who dies of heart disease may also be an overeater (or drinker).

ECONOMIST: The tobacco wars

According to the World Health Organisation (WHO), smoking cigarettes kills almost five million people worldwide every year and drains the continent's already impoverished public health services as the cost of treating tobacco-related disease soars.

BBC: NEWS | Africa | Why do we still smoke in Africa?