Smoking is not good, only bad. Tobacco smoke contains hundreds of harmful substances, among which 69 known carcinogens can directly cause oral and pharyngeal malignant tumors, laryngeal cancer, esophageal cancer, gastric cancer, liver cancer, pancreatic cancer, renal cancer, bladder cancer, cervical cancer and other cancers.

In addition, smoking can lead to chronic obstructive pulmonary disease and cardiovascular and cerebrovascular diseases, which is one of the main causes of coronary heart disease, stroke, aortic aneurysm and peripheral vascular diseases, and also an independent risk factor for cardiovascular and cerebrovascular diseases.

Extended data

In order to cope with the growing public health awareness, tobacco companies try to keep cigarettes attractive by changing the design of cigarette products, and vigorously promote the concepts of low tar, softness, light taste, long filter tip and Chinese herbal medicine to confuse the public's understanding of the dangers of smoking.

However, countless scientific evidences in the world show that smoking these so-called "low-harm" cigarettes can not reduce the harm of smoking to the body, but often increase the amount of smoking and reduce smokers' willingness to quit smoking.

People's Network-What are the disadvantages of smoking?