Any amount of second hand tobaco smoke is thought to be unsafe, and second hand smoke causes more that 600,000 early deaths per year.

被动吸入无论多么少量的烟雾都被认为是不安全的，每年因被动抽烟死亡的人数超过60万人。

There are lots of environmental risks that can be damaging to your health – houses with lead paint, second hand smoke, smog.

有许多环境风险可能会损害您的健康——有含铅油漆的房屋、二手烟、烟雾。

It's much like a non-smoker being trapped in a room and getting cancer from second hand smoke while a heavy smoker continues to puff away in good health.

这就好比被困在房间里不吸烟的人，因为沾染二手烟患上癌症，而瘾君子们则叼着烟卷，身体健康。