How does smoking affect life expectancy?

The average life expectancy of a forty-year-old is seventy-eight years for men and eighty-three years for women, according to the statistics. These numbers include everyone who dies prematurely from health complications caused by smoking. If you remove the data for smokers from the data for the general population, life expectancy becomes substantially greater.

Thus, we can say that smokers have shorter lives and more medical problems than nonsmokers. We can also say that nonsmokers live longer.

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