世界上每年死于因吸烟引起的疾病有３００万人。每１０秒钟就有一人因吸烟而丧生。美国有烟民５５００多万 ,中国有３亿。全世界约有１２亿人吸烟 ,是世界１５岁以上人口的三分之一 ,其中８亿在发展中国家。烟草是２５种疾病的已知和可能的起因。终身吸烟死于烟草的机会为５０ Every year in the world, 3 million people die from diseases caused by smoking. Every 10 seconds, one person died of smoking. There are more than 55 million smokers in the United States and 300 million in China. About 1.2 billion people in the world smoke and it is one-third of the world’s population aged over 15 years, of which 800 million are in developing countries. Tobacco is a known and possible cause of 25 diseases. The chance of dying tobacco from lifelong smoking is 50