Second hand smoking has been recognized harmful to other people.

二手烟已经被确认对其他人有危害。

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Now anti-smoking activists condemn third-hand smoking – the supposed dangers of smelling the clothes of someone who has recently smoked;

但现在，反吸烟活动分子谴责三手烟——衣服熏有烟味的人也应该危险;

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In the recent few years, overseas research data also suggests that passive smoking or second-hand smoking could be a risk factor for heart diseases.

吸烟会诱发冠心病，近年的数据发现，吸二手烟亦是引致心脏病的高危因素。

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The most common cause of COPD is long-term smoking or years of exposure to second-hand smoke.

VOA: standard.2010.06.21

And just like smoking and its second-hand health effects, second-hand fat should be a serious societal concern.

FORBES: Obesity: The New 'Just Say No' For 2013

Previous reports recorded a "sharp decrease" in "non-smokers exposure to second-hand smoke" following the ban in smoking in public places in 2006.

BBC: Scottish Health Survey: Obesity still problem for Scots

Worldwide, as many as 40% of children, 33% of non-smoking men and 35% non-smoking women were exposed to second-hand smoke in 2004, researchers found.

BBC: Passive smoking 'kills 600,000' worldwide