He law of effect<span> is a </span>psychological<span> principle advanced by </span>Edward Thorndike<span> in 1898 on the matter of </span>behavioral conditioning<span> (not then formulated as such) which states that "responses that produce a satisfying effect in a particular situation become more likely to occur again in that situation, and responses that produce a discomforting effect become less likely to occur again in that situation
Life expectancy for smokers is at least 10 years shorter than that of non-smokers. Quitting smoking before the age of 40 reduces the risk of dying from smoking-related disease by about 90%.
