Tobacco and the global lung cancer epidemic
Max Parkin et al.42 have estimated a global annual lung cancer toll of 1,240,000 new cases (incidence) and 1,100,000 deaths (mortality) for the year 2000. Assuming that 85% of all lung-cancer deaths are caused by tobacco43, this gives a global toll of about 935,000 lung-cancer deaths per annum. As a nation's lung cancer burden seems to be an expression of smoking levels that were in existence roughly 35 years previously (on average), this means that the 3 
1012 cigarettes smoked per year in the mid-1960s gave rise to about 900,000 lung-cancer deaths, or about one lung-cancer death for every 3 million cigarettes smoked.
