Aircraft engine exhaust emissions and other airport-related contributions to ambient air pollution: A review.

Atmos Environ (1994) · 2014 · PMC7108289 · PMID 32288558

Europe PMC DOI

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closest p

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a clear trendno p-value reported

They also observed a clear trend of increasing particle diameter with increasing engine power setting and distance from the engine exit.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.