Synonym: befoulment, contamination, defilement. Similar words: evolution, resolution, revolutionary, execution, collection, institution, distribution, prosecution. Meaning: [pə'luːʃn] 
n. 1. undesirable state of the natural environment being contaminated with harmful substances as a consequence of human activities 2. the state of being polluted 3. the act of contaminating or polluting; including (either intentionally or accidentally) unwanted substances or factors.
n. 1. undesirable state of the natural environment being contaminated with harmful substances as a consequence of human activities 2. the state of being polluted 3. the act of contaminating or polluting; including (either intentionally or accidentally) unwanted substances or factors. 
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271. He said the buses would cut air pollution and reduce sheep deaths from accidents with cars.
272. Other wells continued to burn, causing atmospheric pollution on an epic scale.
273. The utilities' charts show that the overwhelming majority of air pollution in the region results from natural dust.
274. Cars and industry in El Paso contribute to the air pollution, of course.
274. Sentencedict.com try its best to collect and build good sentences.
275. The responsibility for detecting pollution and enforcing regulations in the two water authorities studied rests with a policing section or inspectorate.
276. Crawford is one of the founders of the International Dark-Sky Association, which lobbies governments to adopt pollution standards.
277. So what are greater congestion, higher accident rates, and worse air pollution compared to the freedom to drive?
278. While the outbreak directed media attention to pollution in the North Sea, ascribing the guilt to pollution was premature.
279. That way we may avoid the con-sequences of too-hasty action: global warming, unforeseen pollution, imbalances of supply and demand.
280. Some smogs can be made worse when pollution is imported from outside the city boundary from neighbouring urban-industrial areas.
More similar words: evolution, resolution, revolutionary, execution, collection, institution, distribution, prosecution, contribution, constitution, institutional, collaboration, constitutional, roll up, poll, notion, option, action, nation, motion, edition, fiction, section, question, portion, mention, auction, location, position, zonation.