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Smoking has a significant negative health impact, and causes many dangerous and fatal conditions, including cancers, heart disease, and respiratory disease.

Smoking has a significant negative health impact, and causes many dangerous and fatal conditions, including cancers, heart disease, and respiratory disease.

It has been estimated that cigarette smoking is responsible for 28% of all deaths in developed countries in the 35-69 age group, as well as 35% of all cancer deaths and 28% of all deaths due to vascular diseases.<ref>Hecht, 2006.</ref>  Smoking increases the risk of oral, pharyngeal, esophageal, laryngeal, lung, uterine, cervical, urinary, and kidney cancers.<ref>http://www.cdc.gov/tobacco/health_effects/cancer.htm</ref>

It has been estimated that cigarette smoking is responsible for 28% of all deaths in developed countries in the 35-69 age group, as well as 35% of all cancer deaths and 28% of all deaths due to vascular diseases.<ref>Hecht, 2006.</ref>  Smoking increases the risk of oral, pharyngeal, esophageal, laryngeal, lung, uterine, cervical, urinary, and kidney cancers.<ref>https://www.cdc.gov/tobacco/health_effects/cancer.htm</ref>

Coronary heart disease is one of the biggest causes of death in the United States, and is 2-4 more likely in smokers than nonsmokers.  Smokers are also 10 times more likely to develop peripheral vascular disease, which is a narrowing of the arteries.  Additionally, smokers are twice as vulnerable to a stroke compared with nonsmokers.<ref>http://www.cdc.gov/tobacco/health_effects/heart.htm</ref>  Smoking also negatively impacts the respiratory system.  Approximately 90% of all deaths from chronic lung diseases are the result of smoking.<ref>http://www.cdc.gov/tobacco/health_effects/respiratory.htm</ref>

Coronary heart disease is one of the biggest causes of death in the United States, and is 2-4 more likely in smokers than nonsmokers.  Smokers are also 10 times more likely to develop peripheral vascular disease, which is a narrowing of the arteries.  Additionally, smokers are twice as vulnerable to a stroke compared with nonsmokers.<ref>https://www.cdc.gov/tobacco/health_effects/heart.htm</ref>  Smoking also negatively impacts the respiratory system.  Approximately 90% of all deaths from chronic lung diseases are the result of smoking.<ref>https://www.cdc.gov/tobacco/health_effects/respiratory.htm</ref>

In addition, smoking has been shown to double the risk of Alzheimer's Disease.<ref>http://news.bbc.co.uk/1/hi/health/115829.stm</ref>

In addition, smoking has been shown to double the risk of Alzheimer's Disease.<ref>http://news.bbc.co.uk/1/hi/health/115829.stm</ref>

==Tobacco use in the United States==

==Tobacco use in the United States==

Tobacco use varies regionally within the United States. In 2006, the most recent year for which data are available, adult tobacco use was highest in [[Kentucky]], where 50% of adults used tobacco, followed by [[West Virginia]] (49%), [[Oklahoma]] (47%), [[Tennessee]] (47%), and [[Ohio]] (46%). States with the lowest rates of adult tobacco use in 2006 were [[Utah]] (1%), [[California]] (2%), [[Idaho]] (3%), [[Connecticut]], (4%), and [[Massachusetts]], (5%).<ref>http://www.cdc.gov/tobacco/data_statistics/state_data/data_highlights/2006/index.htm</ref>

Tobacco use varies regionally within the United States. In 2006, the most recent year for which data are available, adult tobacco use was highest in [[Kentucky]], where 50% of adults used tobacco, followed by [[West Virginia]] (49%), [[Oklahoma]] (47%), [[Tennessee]] (47%), and [[Ohio]] (46%). States with the lowest rates of adult tobacco use in 2006 were [[Utah]] (1%), [[California]] (2%), [[Idaho]] (3%), [[Connecticut]], (4%), and [[Massachusetts]], (5%).<ref>https://www.cdc.gov/tobacco/data_statistics/state_data/data_highlights/2006/index.htm</ref>

==Tobacco use in Europe ==

==Tobacco use in Europe ==