吸烟的危害英语 课件.ppt

part 2:The dangers of youth smoking;;Tobacco and youth;;Regular teen smokers report problems such as:;Brain;Head and Face ;Heart ;Lungs ;DNA ;Stomach and Hormones;addicted to nicotine， hard to quit;Tobacco use is linked to other harmful behaviors;;part 3:Second-hand smoke and youth;Second-hand smoke;10 facts on second-hand smoke;Fact 1 Second-hand smoke is the smoke that fills restaurants, offices or other enclosed spaces when people burn tobacco products such as cigarettes, bidis and water pipes. Everyone is exposed to its harmful effects.;Fact 2 There is “no safe level of exposure to tobacco smoke”. Creating 100% smoke-free environments is the only way to protect people from the harmful effects of second-hand tobacco smoke.;Fact 3 Second-hand smoke causes 600 000 premature deaths per year. There are more than 4000 chemicals in tobacco smoke, of which at least 250 are known to be harmful and more than 50 are known to cause cancer.;Fact 4 In adults, second-hand smoke causes serious cardiovascular and respiratory diseases, including coronary heart disease and lung cancer. In infants, it causes sudden death. In pregnant women, it causes low birth weight.;Fact 5 Separate or ventilated smoking areas do not protect non-smokers from second-hand smoke. Second-hand smoke can spread from a smoking area to a non-smoking area, even if the doors between the two areas are closed and even if ventilation is provided. Only 100% smoke-free environments provide effective protection.;Fact 6 About 40% of all children are regularly exposed to second-hand smoke at home. Thirty-one per cent of the deaths attributable to second-hand smoke occur in children.;Fact 7 Youths exposed to second-hand smoke at home are one-and-a-half to two times more likely to start smoking than those not exposed.;Fact 8 Ten percent of the economic costs related to tobacco use are attributable to second-hand smoke. Tobacco use imposes both direct economic costs on society, such as those associated with treatin