Exhaust emission of vehicle engines is one of the primary air pollution sources.

车用内燃机的废气排放是大气污染的主要污染源之一。

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This article summarizes the major indoor air pollution sources and major pollutants.

本文概括了室内空气污染的主要污染源及主要污染物。

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Recently, cooking fume is one of the most important air pollution sources in many cities.

近年来，饮食业油烟污染已成为城市大气污染的主要来源之一。

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The research team used data from a number of sources including air pollution reports, traffic counts and tax offices.

BBC: US researchers map carbon emissions at street level

Located remotely from other sources of air pollution, Mauna Loa is commonly considered one of the most reliable places to measure concentrations of gases in the atmosphere.

FORBES: Atmospheric Carbon At All-Time-High

We have the technology to clean up the unhealthiest sources of air pollution, and my research reiterated for me that we can't afford to wait too long to clear the air.

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