Smoking is the direct inhalation of tobacco smoke, which contains many harmful substances, such as nicotine, carbon monoxide, tar and so on. These chemicals will directly damage the lungs, cardiovascular system and other organs of smokers, and increase the risk of health problems such as cancer, respiratory diseases, heart disease and stroke.
Secondhand smoke refers to the harmful substances in the smoke exhaled by smokers being inhaled by non-smokers, or the residual smoke in the air near smokers being inhaled by others. The harmful substances in secondhand smoke will also have a negative impact on the health of non-smokers. Long-term exposure to secondhand smoke may increase the risk of respiratory diseases, cardiovascular diseases, lung cancer and childhood diseases.
Although smoking is more harmful to personal health, secondhand smoke is also a serious health problem, especially for those who have been exposed to secondhand smoke for a long time, such as family members, employees in the workplace and people in public places.
In order to protect the health of themselves and others, smokers should consider quitting smoking and avoid smoking indoors or near non-smokers. Non-smokers should try to stay away from the smoking environment, and encourage smokers to quit smoking or restrict smoking. In addition, establishing a smoke-free environment and advocating a smoking ban policy in public places are also important measures to reduce the harm of second-hand smoke.