Cigarettes
The health effects of tobacco are the circumstances, mechanisms, and factors of tobacco consumption on human health. Epidemiological research has been focused primarily on cigarette tobacco smoking, which has been studied more extensively than any other form of consumption. Tobacco is the single greatest cause of preventable death in the US and worldwide. Tobacco use leads most commonly to diseases affecting the heart and lungs, with smoking being a major risk factor for heart attacks, strokes, emphysema, chronic bronchitis, high blood pressure, and various forms of cancer. The effects...
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