The hazards of second-hand smoke include increasing the incidence of lung cancer, causing infertility or fetal malformation, and being prone to osteoporosis. Secondhand smoke contains twice as much nicotine and tar as direct smoking. Long-term secondhand smoke can do a lot of harm.

1, increasing the incidence of lung cancer:

Secondhand smoke, also known as environmental tobacco smoke, includes sidestream smoke from cigarettes, cigars or pipes. Secondhand smoke contains more than 40 carcinogens. If inhaled by people who don't smoke at ordinary times, it may also be mixed with radon decay substances, which is more harmful to human health. Nearly 80% of lung cancer patients are smokers or passive smokers, so second-hand smoke will increase the incidence of lung cancer.

2, lead to infertility or fetal malformation:

The harmful substance in cigarettes is nicotine, which will greatly reduce the vitality of sperm and may lead to infertility. Even after pregnancy, if the fertilized egg is not healthy enough, long-term exposure of pregnant women to second-hand smoke may also lead to fetal malformation.

3, easy to osteoporosis:

Nicotine will greatly affect the absorption of calcium, and it will also have adverse effects on the absorbed calcium, so people who smoke secondhand smoke all the year round must supplement calcium.

Secondhand smoke is more harmful than direct smoking. In order to prevent adverse consequences, stay away from second-hand smoke.