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。

youdao

He conducted a rigorous experiment on the effect of second hand smoking.

他针对吸二手烟的影响进行了一次严谨的实验。

youdao

I feel car exhaust, and smoke coming from stir frying vegetables are even more harmful than second hand smoking.

我觉得汽车的尾气﹑炒菜的油烟对健康的危害可能比被动吸烟更厉害。

youdao

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