Wiktionary
n. The contamination of the atmosphere by noxious gases and particulates.
WordNet
n. pollution of the atmosphere; "air pollution reduced the visibility"
Wikipedia
Air pollution is the introduction of particulates, biological molecules, or other harmful materials into Earth's atmosphere, causing diseases, allergies, death to humans, damage to other living organisms such as animals and food crops, or the natural or built environment. Air pollution may come from anthropogenic or natural sources.
The atmosphere is a complex natural gaseous system that is essential to support life on planet Earth.
Indoor air pollution and urban air quality are listed as two of the world's worst toxic pollution problems in the 2008 Blacksmith Institute World's Worst Polluted Places report. According to the 2014 WHO report, air pollution in 2012 caused the deaths of around 7 million people worldwide, an estimate roughly matched by the International Energy Agency.
Usage examples of "air pollution".
There's one thing you can say for air pollution, you get utterly amazing sunrises.
The effect of constant aircraft noise on wildlife is one issue, but questions have also been raised about potential fuel spills, air pollution and traffic.
The streets were swept clean, water flowed on demand from the sink taps, air pollution was minimal, the small, grayish satellite dishes were not ugly, and all the kids looked healthy.
The Green Weenies would love to arrest an entire city for air pollution.
Back in 1978 they had an air pollution scale that went from one to twenty.
He had read off a list of books dealing with air pollution and water pollution that Bradley had given him.
Today, with spreading alarm over air pollution, water pollution, urban crowding and other such factors, more and more health authorities are coming around to the ecological notion that the individual needs to be seen as part of a total system, and that his health is dependent upon many subtle external factors.