News tagged with cigarette smoke

Related topics: lung cancer , smokers , smoking , chronic obstructive pulmonary disease , nicotine

Smoking out the facts in the E-cigarette debate

Electronic cigarettes seem to have become as ubiquitous as the vapor they produce. Their popularity has been skyrocketing over the past two years, even in the midst of a fierce debate about their potential ...

Sep 30, 2014
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Tobacco display bans protect youth and quitters

Ending the display and promotion of cigarettes and tobacco in retail shops helps prevent young people taking up smoking and keeps quitters on track, according to new University of Otago research.

Sep 02, 2014
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Obese or overweight teens more likely to become smokers

A study examining whether overweight or obese teens are at higher risk for substance abuse finds both good and bad news: weight status has no correlation with alcohol or marijuana use but is linked to regular ...

Aug 29, 2014
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Heart group: E-cigarettes might help smokers quit

The American Heart Association's first policy statement on electronic cigarettes backs them as a last resort to help smokers quit. The American Cancer Society has no formal policy but quietly took a simil ...

Aug 25, 2014
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Tobacco smoking

Tobacco smoking is the practice where tobacco is burned and the vapors either tasted or inhaled. The practice began as early as 5000–3000 BC. Many civilizations burnt incense during religious rituals, which was later adopted for pleasure or as a social tool. Tobacco was introduced to the old world in the late 1500s where it followed common trade routes. The substance was met with frequent criticism, but became popular nonetheless. German scientists formally identified the link between smoking and lung cancer in the late 1920s leading the first anti-smoking campaign in modern history. The movement, however, failed to reach across enemy lines during the Second World War, and quickly became unpopular thereafter. In 1950, health authorities again began to suggest a relationship between smoking and cancer. Scientific evidence mounted in the 1980s, which prompted political action against the practice. Rates of consumption from 1965 onward in the developed world have either peaked or declined. They however continue to climb in the developing world.

Smoking is the most common method of consuming tobacco, and tobacco is the most common substance smoked. The argicultural product is often mixed with other additives and then pyrolyzed. The resulting vapors are then inhaled and the active substances absorbed through the alveoli in the lungs. The active substances trigger chemical reactions in nerve endings which hightens heart rate, memory, alertness, and reaction time. Dopamine and later endorphins are released, which are often associated with reward and pleasure. As of 2000, smoking is practiced by some 1.22 billion people. Men are more likely to smoke than women, however the gender gap declines with younger age. The poor are more likely to smoke than the wealthy, and people of developing countries than those of developed countries.

Many smokers begin during adolescence or early adulthood. During the early stages, smoking provides pleasurable sensations and thus serves as a source of positive reinforcement. After an individual has smoked for many years, the avoidance of withdrawal symptoms and negative reinforcement become the key motivations.

This text uses material from Wikipedia licensed under CC BY-SA