How many carcinogens have been found in secondhand smoke?

二手烟中发现了多少种致癌物质？

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High concentrations of many of these chemicals are found in secondhand smoke.

研究发现二手烟中含有高浓度的上述有害物质。

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In the past decade, we've seen tremendous declines in secondhand smoke exposure in the workplace and public places.

在过去的十年中，我们已经发现被动吸烟暴露在工作场合和公共场合中巨大下降。

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Each year in the United States, secondhand smoke kills an estimated 46,000 nonsmokers from heart attacks.

VOA: special.2009.01.07

Over the long term, secondhand smoke also raises the risk of disease in nonsmokers.

VOA: special.2009.01.07

Secondhand smoke also causes breathing infections in young children.

VOA: special.2009.05.27

Overall, the researchers found, breathing secondhand smoke in private social settings nearly tripled the risk of being diagnosed with sinusitis, while breathing it at work more than doubled the risk.

CNN: Sinus trouble? Secondhand smoke may be to blame

The survey, jointly conducted by the China Center for Disease Control, the U.S. Centers for Disease Control and Prevention and the World Health Organization, shows that seven out of 10 adults reported being exposed to secondhand smoke in a typical week.

CNN: China clouded in cigarette smoke

"If 40 percent of chronic rhinosinusitis is caused by secondhand smoke, you're in a good position to eliminate...those cases if you eliminate secondhand smoke, " he says.

CNN: Sinus trouble? Secondhand smoke may be to blame