Examples range from contamination of the food or water supply, to high levels of air or noise pollution, a chemical accident, a disease outbreak or a natural disaster.

这方面例子的范围包括从食物或水供应的污染，到空气或噪音高度污染、化学事故、疾病暴发或自然灾害。

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Efficient ventilation and sound air current are significant to improve indoor air quality, control the contamination concentration, and ensure the realization of healthy and comfort air-condition.

有效地通风和合理的气流组织对于改善室内空气品质，控制室内污染物浓度，保证实现健康建筑、健康舒适性空调有着重要的意义。

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The most alarming of all man's assaults upon the environment is the contamination of air, earth, rivers, and sea with dangerous and even lethal materials.

在人对环境的所有袭击中最令人震惊的是空气、土地、河流以及大海受到了危险的、甚至致命物质的污染。

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Today, Japan still faces the possibility of nuclear meltdown and continued contamination of air, water, food and agriculture.

FORBES: Agroterrorism: Managing Risk In The Food Supply Chain

Beijing Times says authorities must also act quickly to introduce acceptable quality standards for bottled drinking water to allay public fears about contamination from deteriorating air and water quality as well as polluting industries.

BBC: China media: Fake food scandals