Banned in today's cosmetics, the cancer-causing tar residue can be found in burnt substances and foods such barbecue, coffee, cigarette smoke, and coal tar.
Smoking cigarettes that have a lower yield of tar does not substantially reduce the risk for lung cancer.
吸那些焦油含量较低的香烟本质上不能降低癌症风险。
3
Tobacco smoke is hazardous because it contains a number of unhealthy chemicals, including some 60 carcinogens (cancer-causing agents), tar, arsenic, carbon monoxide and nicotine.