air pollution

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Definition of air pollution

Contamination of air by smoke and harmful gases, mainly oxides of carbon, sulfur, and nitrogen.

QUIZ

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Question 1 of 9

Which of the following nouns has an irregular plural form?

And Air Force assessors are the first to say such imaging never tells the whole story.
Pentagon Doesn’t Know How Many People It’s Killed in the ISIS War|Nancy A. Youssef|January 7, 2015|DAILY BEAST
Sprawled on chaise lounges with their knees high in the air and their legs spread wide.
Powerful Congressman Writes About ‘Fleshy Breasts’|Asawin Suebsaeng|January 7, 2015|DAILY BEAST
Indeed, Lion Air, with 45 percent of the domestic Indonesian airline market, has swallowed the Fernandes formula whole.
Annoying Airport Delays Might Prevent You From Becoming the Next AirAsia 8501|Clive Irving|January 6, 2015|DAILY BEAST
There is a larger reason, beyond the airlines themselves, why Lion Air and 61 other Indonesian airlines are on this black list.
Annoying Airport Delays Might Prevent You From Becoming the Next AirAsia 8501|Clive Irving|January 6, 2015|DAILY BEAST

The Pentagon said Faal served in the Air Force for seven years, during which time he became a U.S. citizen.
The Shadowy U.S. Veteran Who Tried to Overthrow a Country|Jacob Siegel|January 6, 2015|DAILY BEAST
Bells were pealing and tolling in all directions, and the air was filled with the sound of distant shouts and cries.
Davy and The Goblin|Charles E. Carryl
It is to be remembered, however, that a few of these bacteria may reach the sputum from the upper air-passages.
A Manual of Clinical Diagnosis|James Campbell Todd
We had now approached closely to the foot of the mountain-ranges, and their lofty summits were high above us in mid-air.
Blackwood's Edinburgh Magazine, Volume 60, No. 372, October 1846|Various
He stood, with the air of a hero, both arms extended towards the amazed pair of lovers.
The Joyous Adventures of Aristide Pujol|William J. Locke
Their method of curing the leaves was to air-dry them and then packing them until wanted for use.
Tobacco; Its History, Varieties, Culture, Manufacture and Commerce|E. R. Billings.

air pollution

The addition of harmful chemicals to the atmosphere. The most serious air pollution results from the burning of fossil fuels, especially in internal-combustion engines.