eassy on tobacco 300 words
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Tobacco is the biggest enemy of public health today. The effects of tobacco use, as we all know, are destructive and widespread.
Not many know that tobacco is one of the primary causes of cancer and heart attacks. Many youngsters, in both cities and rural areas, are getting addicted to tobacco use in various forms, which, in the long run, can have an adverse effect on health and life of the population.
According to a recent study conducted by the American Cancer Society, almost 30 per cent of the Indian population, in the age group of 15 years and above, use some form of tobacco. While the early forms of tobacco include chewing tobacco leaves, ghutka and beedis, cigarettes, cigars, chillum and hookahs are equally common, especially in the urban areas.
Tobacco smoke contains approximately 4,000 chemicals in cigarettes, 100s of which are toxic like formaldehyde, ammonia and cadmium. These constituents of cigarettes have a detrimental effect on everything: from the body’s immunity to the functioning of the organs.
Answer:
Tobacco smoking is the practice of burning tobacco and ingesting the smoke that is produced. The smoke may be inhaled, as is done with cigarettes, or simply released from the mouth, as is generally done with pipes and cigars. The practice is believed to have begun as early as 5000–3000 BC in Mesoamerica and South America.[1] Tobacco was introduced to Eurasia in the late 17th century by European colonists, where it followed common trade routes. The practice encountered criticism from its first import into the Western world onwards but embedded itself in certain strata of a number of societies before becoming widespread upon the introduction of automated cigarette-rolling apparatus.
Marlboro's package of the ice blast cigarette
German scientists identified a link between smoking and lung cancer in the late 1920s, leading to the first anti-smoking campaign in modern history, albeit one truncated by the collapse of Nazi Germany at the end of World War II.[4] In 1950, British researchers demonstrated a clear relationship between smoking and cancer.[5] Evidence continued to mount in the 1980s, which prompted political action against the practice. Rates of consumption since 1965 in the developed world have either peaked or declined.[6] However, they 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 agricultural product is often mixed with additives[8] and then combusted. The resulting smoke is then inhaled and the active substances absorbed through the alveoli in the lungs or the oral mucosa.[9] Combustion was traditionally enhanced by addition of potassium or nitrates.[citation needed] Many substances in cigarette smoke trigger chemical reactions in nerve endings, which heighten heart rate, alertness[10] and reaction time, among other things.[11] Dopamine and endorphins are released, which are often associated with pleasure.[12] As of 2008 to 2010, tobacco is used by about 49% of men and 11% of women aged 15 or older in fourteen low-income and middle-income countries (Bangladesh, Brazil, China, Egypt, India, Mexico, Philippines, Poland, Russia, Thailand, Turkey, Ukraine, Uruguay and Vietnam), with about 80% of this usage in the form of smoking.[13] The gender gap tends to be less pronounced in lower age groups.[14][15]
Many smokers begin during adolescence or early adulthood.[16] During the early stages, a combination of perceived pleasure acting as positive reinforcement and desire to respond to social peer pressure may offset the unpleasant symptoms of initial use, which typically include nausea and coughing. After an individual has smoked for some years, the avoidance of withdrawal symptoms and negative reinforcement become the key motivations to continue.
A 2009 study of first smoking experiences of seventh-grade students found out that the most common factor leading students to smoke is cigarette advertisements. Smoking by parents, siblings and friends also encourages students to smoke.[17]
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