Cancer of the lung is most prevalent in males in Western countries and is also said to be increasing in India. It is known to be associated with smoking cigarettes. It is generally accepted that there is a causal connection between cigarette smoking and lung cancer. Epidemiological studies have shown that there is a clear relationship between the number of cigarette smoked and the incidence of lung cancer. Giving up smoking decreases the susceptibility to lung cancer, in proportion to the number of years that smoking has been given up.
The longer a cigarette is, the more tar and nicotine one inhales. The last half of the cigarette contains twice as much tar and nicotine as the first half. This applies to ” king-sized’ cigarettes also.
Further, no method of treating tobacco or filtering the smoke has yet been demonstrated to be effective in materially reducing or eliminating the hazards of lung cancer.
So, smokers are advised to stop smoking or to drastically reduce it.