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汉语拼音：kōng qì wū rǎn

也叫大气污染。大气中污染物的浓度达到一定程度，对人类生产、生活或人群健康造成不良影响或危害的现象。其形成有自然原因和人为原因。前者如火山喷发、森林火灾、沙尘暴等；后者如燃料燃烧和工业生产排放废气、颗粒物等。

• The smog that has engulfed Moscow for a week eased a bit Tuesday, but the concentration of pollutants remained high.

  周二，盘踞莫斯科达一周之久的烟雾稍有消散，但空气污染物浓度依然很高。

• The problem of the air pollution in cities and towns must be dealt with if the environ ment is going to be preserved.

  如果要保护环境，城镇空气污染问题必须处理。

• The questions one must ask are how much does air pollution cost, and what expense is justified in rectifying it?

  人们一定要问空气污染的代价多大，为了改正它，要花多少才算是合理的？。

• Black carbon is part of a chemical mix of particulate matter that has long been an air-pollution concern due to its impacts on human health.

  炭黑作为化学颗粒混合物的一部分，鉴于其对人类健康造成的影响，长期以来都被当做一种空气污染物而备受关注。

• "It seems to trigger worse problems in people with heart disease rather than cause it, " said the GP.

  GP认为，“空气污染使心脏问题恶化而不是导致心脏出现问题。”

• The most basic: how much of a public health toll does air pollution take around the globe?

  比如，最基本的问题：全球各地，空气污染危及健康的具体人数到底是多少？

• Sulfur dioxide has a more venerable history as an air pollutant than any other chemical.

  作为一种空气污染物来说，二氧化硫比任何其它化合物历史更悠久。

• This review emphasizes the integration of such knowledge into a concept of asthma as an air pollution - host defense disorder .

  这篇综述强调把这些知识综合到气喘病的概念之中，将其认作是一种空气污染-本体防御的失调。

• The U. S. Embassy's daily air-pollution readings, sent out on Twitter, typically alternate between "hazardous" and "very hazardous. "

  美国大使馆每天在Twitter上发布的空气污染指标总是在“危险”和“重度危险”之间变换。