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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61. Pollution is having a bad effect on fish stocks.
62. This will increase public consciousness of the pollution issue.
63. Pollution can harm marine life.
64. We need more laws to stop pollution.
65. Supplies are under increasing threat from overuse and pollution.
66. Pollution from cars has become a major problem.
67. We're doing a project on pollution.
68. He's doing a class project on pollution.
69. Pollution is eating away at the stone.
70. Prosecutions for water pollution more than doubled.
71. The teacher set an assignment on pollution.
72. Cars cause pollution,[Sentencedict.com ] both smog and acid rain.
73. The pollution from the factory is a public danger.
74. The report identified eight pollution hot spots.
75. The summers were hazy with pollution.
76. Pollution poses a threat to fish.
77. Pollution and neglect have conspired to ruin the city.
78. Researchers have now established a connection between air pollution and asthma.
79. The lake yielded up a poor fish harvest last year because of pollution.
80. Discuss pollution with your child, emphasizing how nice a clean street, lawn(sentencedict.com), or park looks.
81. Recycling also helps control environmental pollution by reducing the need for waste dumps.
82. Pollution has decayed the surface of the stonework on the front of the cathedral.
83. Cars are still one of the principal contributors to air pollution.
84. As regards pollution, old diesel-engined vehicles are the worst offenders.
85. The oil company was found guilty on ten counts of pollution, and was punished with a $250 million fine.
86. Pollution inspectors were called to a leak from a chemical factory.
87. Company directors may be deemed guilty of an offence their company causes pollution.
88. Pollution is affecting many creatures lower down the food chain.
89. Tests were conducted to ascertain whether pollution levels have dropped.
90. Pollution from the works has been reduced by 70 per cent.
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.