Scientists from the U.S. found that teenagers who often become passive smokers may suffer from deafness.
Experts explain hearing problems in passive smokers, the fact that the chemicals contained in tobacco smoke can impair blood supply to the hearing. In a study by American scientists took part in 1.5 thousand teenagers from 12 to 19 years. After checking their sensitivity to the sounds of different frequencies, the researchers found that those exposed to tobacco smoke are twice as likely to have problems with hearing.
Previously, scientists have found an association between smoking and parental behavior and school performance of their children. Parents who have the habit of smoking at home are at risk of bringing up children who will perform poorly in school and will have problems with discipline.
According to WHO, in the last century, smoking killed 100 million people. This year from diseases associated with smoking: stroke, lung cancer and heart attack - could die more than 5 million people. And by 2030, mortality from this bad habit risk increase to 8 million.
