For many years, people thought the 1 of smoking were 2 to smokers. But new studies have found that smoke from cigarettes can be 3 to non-smokers too.
In December 1987, a U.S. Government report 4 that non-smokers could risk getting lung cancer from 5 in other people's cigarette smoke.
Another study looked at non-smoking 6 athletes who had smoking parents or friends. Being 7 cigarette smoke hurt the athletes' lungs, and made them 8 more than athletes who did not have smokers close 9 , the study said. Studies like these have promoted the banning of smoking in 10 places.
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