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根据科学家研究,香烟的烟雾中具有多种毒素。现在,全世界每年约有250万人死于与吸烟有关的疾病,吸烟已成为20世纪的一种“瘟疫”。烟草中的主要有害成分有以下几种: 一、尼古丁:又称烟碱,具有剧烈的毒性。一支香烟所含的尼古丁足以杀死一只小鼠,40～60毫克尼古丁可以毒死一个成年人。尼古丁还同鸦片、海洛因一样,具有成瘾性。二、烟焦油:俗称“烟油子”。烟焦油中含有多种有害物质,其中苯并芘、亚硝胺等具有较强的致癌
According to the study of scientists, cigarette smoke has a variety of toxins. Every year, about 2.5 million people die from smoking-related diseases in the world each year, and smoking has become a “plague” of the 20th century. The main harmful ingredients in tobacco are the following: First, nicotine: also known as nicotine, with severe toxicity. A cigarette contains enough nicotine to kill a single mouse and 40 to 60 milligrams of nicotine can kill an adult. Nicotine is also addictive to opium and heroin. Second, smoke tar: commonly known as “smoke and oil child.” Tobacco tar contains a variety of harmful substances, including benzopyrene, nitrosamines, etc. have a strong carcinogenic