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Scientists discover how cigarette smoke causes cancer: Study points to new treatments, safer tobacco
Date:2/27/2008

n the United States, resulting in more than 400,000 deaths per year or about 1 in 5 U.S. deaths overall. Smoking accounts for the vast majority of lung cancer deaths, causing 90 percent of all lung cancer deaths in men and about 80 percent in women. In 2000, a Surgeon General report revealed that tobacco smoke contains more than 4,000 chemical compounds, with 43 being known carcinogens. Some of the 4,000 compounds result from chemicals added in processing to improve taste, increase burning times, and prolong shelf life.


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