1 . The Dangers of Secondhand Smoke
Most people know that cigarette smoking is harmful to their health. Scientific research shows that it causes many kinds of diseases.
Environmental Protection Agency reports that about 53,000 people die in the United States each year as a result of exposure to secondhand smoke.
The smoke that comes from a lit cigarette contains many different poisonous chemicals. In the past, scientists did not think that these chemicals could harm a nonsmoker’s health.
Research shows that children who are exposed to secondhand smoke are sick more often than children who live in homes where no one smokes and that the children of smokers are more than twice as likely to develop lung cancer when they are adults as the children of nonsmokers. The risk is even higher for children who live in homes where both parents smoke.
A.Recently, though, scientists changed their opinion after they studied a large group of nonsmokers. |
B.As a matter of fact, almost all of us breathe tobacco smoke at times, whether we realize it or not. |
C.In fact, many people who smoke get lung cancer. |
D.However, secondhand smoke is dangerous to all people, old or young. |
E.People are becoming very aware of the dangers of secondhand smoke. |
F.No one knows for sure why Mr. Gilson has lung cancer. |
G.Many people, including doctors, parents, teachers, and others, are concerned about the health risks of cigarette smoking. |