Despite these positive are lots of negative effects to smoking too. Initially, smoking has been proven to be very dangerous for health. cigarette contains more than 4000 chemical substances, therefore, it dangerous diseases such as heart attacks, asthma, bronchitis or lung cancer. According to a recent report in Britain close to 3,500 people are killed each year in road accidents and 120,000 are killed by smoking. Furthermore, smoking costs governments millions of dollars because of the large number of people who need treatment in hospitals for smoking-related problems. Moreover, passive smoking is also a major concern today. Recent research shows that non-smokers can suffer from health problems if they spend long periods of time among people who do smoke. In the UK children whose parents are are three times as likely to start smoking themselves .