The risks of cigarette smokeDiscovered in the early 1800s and named nicotinine, the oily essence now called nicotine is the main active insredient of tobacco. Nicotine, however, is only a small component of cigarette smoke, which contains more than 4700 chemical compounds, including 43 cancer-causing substances. In recent times, scientific research has been providing evidence that years of cigarette smoking vastly increases the risk of developing fatal medical conditions
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