The precise sources of the PCB plume should be pinned down and used to complete the pollutant inventories of African countries, she says.(她說，這些氯聯苯的污染源必須被清除掉，以完善非洲國家污染物清單。)

Carmakers have challenged the law, in part on the ground that CO2 was not an air pollutant-a notion the Supreme Court has now comprehensively quashed.(汽車制造商對該法律提出質疑，部分根據是二氧化碳不屬空氣污染物——最高法院這一次完全否定了這種說法。)

Carmakers have challenged the law, in part on the ground that CO2 was not an air pollutant-a notion the Supreme Court has now quashed.(汽車制造商曾挑戰這項法律，大部分是以CO2不是空氣污染物質為理由，但是現在最高法院現在已經全面否定了這種概念。)

You know, artificial boards are a source of the pollutant formaldehyde.(你知道，人造板材是污染物甲醛的來源之一。)

The hope is that the gas will stay deep underground for millennia rather than entering the atmosphere as a heat-trapping pollutant.(我們寧愿二氧化碳在地下沉睡一千年，也不愿把它釋放到大氣中來使大氣變暖。)

The environmental quality standards and pollutant discharge or emission standards are divided into state standards and local standards.(環境質量標準、污染物排放標準分為國家標準和地方標準。)

Soon electrofilters of the new generation will be installed here and that will greatly lower the pollutant emissions.(新一代的電子除塵過濾裝置很快將會被安裝起來，這樣會很大程度上降低污染物的排放。)

PM affects more people than any other pollutant.(可吸入顆粒物對人的影響要大于其他任何污染物。)

As an air pollutant, NO2 has several correlated activities.(作為一種空氣污染物，二氧化氮具有幾個相關聯的活動。)

Still, there are many reasons to pursue such studies, he said. Electric fields can help reduce soot formation and pollutant emissions from flames.(仍有許多原因推動這些研究，他說。電場可助于降低火焰中煙塵的形成以及污染物的排放。)