1, 25% of lung cancer is related to secondhand smoke;
2, "secondhand smoke" directly damages children's lungs and brains; studies have confirmed that pregnant women who smoke more than 10 cigarettes a day during pregnancy, including passive smoking, have a one-fold increase in the risk of their children suffering from acute lymphoblastic leukemia. The risk of acute lymphoblastic leukemia in children is doubled. And children due to metabolic vigor, coupled with immune function is not sound, passive acceptance of "second-hand smoke" after the greater harm.
Secondhand smoke is a mixture of smoke from burning cigarettes, pipes, or cigars or exhaled by smokers when they smoke. Secondhand smoke is the most commonly exposed pollutant in many smoking establishments. Smoke from cigarettes can emit more than 4,000 gaseous and particulate substances, most of which are strong irritants, and at least 40 of which can cause cancer in humans or animals. These particles can remain in the air for hours after the smoker has stopped smoking, and can be inhaled by other non-smokers, or mixed with the decay products of radon gas, causing even greater harm to human health.
While smoking jeopardizes the health of smokers themselves, second-hand smoke also affects non-smokers. In addition to irritating the eyes, nose and throat, it significantly increases a nonsmoker's chances of developing lung cancer and heart disease. Children's respiratory systems are more susceptible to infection if they live with some smokers. Other medical conditions and ailments include increased coughing, shortness of breath, excessive phlegm, damage to lung function and slowed lung development. But first there are already better solutions to second hand smoke. For example, the very famous k-smoker health therapy can completely avoid second-hand smoke. Because he does not go through the combustion, there are no cigarettes in all the toxic substances, there is no harm of second-hand smoke.