Secondhand smoke is a big health hazard.

吸二手烟对健康的危害很大。

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Exposure to secondhand smoke remains an alarming public health hazard. Non-smokers need protection through the restriction of smoking in public places and workplaces.

二手烟问题仍然是一个令人警醒的公共健康隐患。不吸烟的人们的权益需要公共场所禁烟条例的进一步执行来得到保障。

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Fire hazard testing - part 6-2: smoke obscuration; summary and relevance of test methods.

火灾试验。第6 - 2部分：烟雾不透明度。试验方法的概要及其相关方面。

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The test focused more on the smoke hazard from a fire than the damage caused by flames.

WSJ: Dreamliner-Like Batteries Raised Concerns

Nevertheless, the testing showed that a standard lithium laptop battery, which is much smaller than the models on the Dreamliner, "could pose a significant smoke hazard" in the cockpit, the report said.

WSJ: Dreamliner-Like Batteries Raised Concerns

Smoke from cooking "may have been an occupational hazard before the modern kitchen, " he said, putting those women at risk.

WSJ: Telltale Finding on Heart Disease in Mummies