To make quantitative analysis for air pollution situation in urban area is required in air pollution source control and air pollution emission total control.

污染源治理和大气污染总量控制的实施需要对城市进行大气污染现状的定量分析。

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The smoke emitting from FCC regenerator is the largest air pollution source in refining plant, which includes particulates, oxysulfides, oxynitrides, carbon monoxide, and so on.

催化裂化（FCC）装置再生器排放的烟气是炼厂最大的空气污染源，包括颗粒物、硫氧化物、氮氧化物和一氧化碳等。

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Objective to study distribution of air pollution source, determine the historical exposure concentration of air pollution in the region, and assure the work scope of health investigation.

目的根据区域大气污染源分布研究确定区域大气污染物历史暴露浓度，确定健康调查工作范围。

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This will allow truckers to reduce emissions significantly (diesel emissions include nitrous oxides, particulate matter, and other air toxics and they are a major source of pollution in some areas).

FORBES: Acceleration of the Natural Gas Highway

Janice Nolen, national policy adviser at the American Lung Association, says that rather than dealing with the harmful effects of air pollution, the focus should be on tackling the problem at source.

CNN: Smog-eating tiles gobble up air pollution