Improperly discarded garbage can spread bacteria that are dangerous to health.

不当丢弃的垃圾会传播细菌并有害健康。

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Bad air quality can contribute to many health problems such as asthma, and improperly discarded garbage can spread bacteria that are dangerous to health.

糟糕的空气质量会导致许多健康问题，比如哮喘，而丢弃不当的垃圾会传播细菌，危害健康。

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The polluted air becomes poisonous and dangerous to health.

被污染的空气有毒而且对身体有害。

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These are often dangerous to their health and safety.

VOA: special.2010.05.17

The history of diet supplements is rife with fads that fizzled or proved dangerous to health.

CNN: ASIANOW - TIME Asia

Most people know that salt and fats are likely to be dangerous to health if taken in large amounts.

ECONOMIST: Eating

Even with a healthy BMI, for example, such people may harbor a lot of visceral fat, deep in their abdomen, a type of fat that is particularly dangerous to health, since it secretes hormones and substances that can hamper insulin's ability to break down sugar.

CNN: Obesity paradox: Why being thin with diabetes is dangerous