Жизнь на Кубе продолжительна не потому что там курят а потому что там развита медицина и вообще социальная подержка населения. А вот инфомация насчёт курения.

1. В этом исследовании говористся о том что на Кубе в 2007 году 86% смертей от рака лёгких, и большой процент других болезней лёгких и сердца вызваны курением.
http://www.ncbi.nlm.nih.gov/pubmed/21483306
Тhis is a descriptive study using smoking prevalence and mortality data in Cuba for 1995 and 2007. Causes of death were grouped in three categories: malignant tumors, cardiovascular diseases and chronic respiratory diseases. Etiological fractions and attributable mortality were calculated by cause and sex. Results Of deaths recorded in 1995 and 2007, 15% and 18% of preventable deaths were attributed to smoking, respectively. In Cuba in 2007, smoking caused 86% of deaths from lung cancer, 78% of deaths from chronic obstructive pulmonary disease, 28% of deaths from ischemic heart disease, and 26% of deaths from cerebrovascular disease. Conclusions Smoking is responsible for high rates of preventable mortality in Cuba

2. Тут говорится о том что рак вышел на Кубе на первое место по причинам смерти людей и одна из основных причин курение.
Cancer the primary cause of death in Cuba in 2012
http://latino.foxnews.com/latino/health/2013/06/08/cancer-primary-cause-death-in-cuba-in-2012/
Cancer in 2012 became the chief cause of death in Cuba for the first time, accounting for 25 percent of all fatalities while exceeding heart disease and cerebrovascular illnesses, the official daily Granma said Saturday........

The specialist at the Public Health Ministry, Idalia Cardero, told Granma that the chief risk factors of the illness on the island are associated with tobacco, inadequate food, obesity, insufficient physical activity and the harmful drinking of alcohol, all factors that can be prevented

3. Здесь говорится о том что исследование показывает что курение вызывает большую смертность от рака лёгких на Кубе чем в других латиноамериканских странах
http://www.ncbi.nlm.nih.gov/pubmed/6574272
The data support the hypothesis that smoking patterns account for the higher lung cancer mortality in Cuba than in other Latin American countries.