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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121. Those small factories are causing a lot of environmental pollution with all their noise and smoke.
122. The computer model assesses the likely impact of new pollution sources.
123. Setting off firecrackers makes a tremendous noise and causes serious air pollution.
124. The new project will lessen the effects of car pollution.
125. Oil pollution could damage the ecology of the coral reefs.
126. The EU has issued a new set of directives on pollution.
127. There is growing public anxiety over levels of air pollution in our cities.
128. We're not doing enough to protect the environment from pollution.
129. The program to phrase down environmental pollution is progressing successfully.
130. The present study reveals an unacceptable level of air pollution in the city centre.
131. They've set up a research project to investigate the harmful effects of air pollution.
132. The chemical pollution poses a threat to the population at large.
133. Pollution has a negative effect on the health of everyone living in the city,[sentencedict.com] not to mention the damage to the environment.
134. Pollution can have disastrous effects on the delicately balanced ecosystem.
135. Car exhaust is the main reason for the city's pollution.
136. Environmental pollution gives great cause for concern, but, on the positive side , people are beginning to try and find solutions.
137. External factors in the production of disease include pollution of the environment.
138. Future generations will be left with a legacy of pollution and destruction.
139. What can be done about the rising levels of pollution?
140. The new government has yet to grapple with the problem of air pollution.
141. Environmentalists say there is a high risk of pollution from the landfill site.
142. The government is trying to back out of its commitment to reduce pollution.
143. Randolph's work was exclusively concerned with the effects of pollution on health.
144. Environmental groups are exerting pressure on the government to tighten pollution laws.
145. Pollution has reached disturbingly high levels in some urban areas.
146. Building more motorways and by-passes will help the environment by reducing pollution and traffic jams in towns and cities.
147. Stationary cars in traffic jams cause a great deal of pollution.
148. The once azure skies of Athens have been ruined by atmospheric pollution.
149. Pollution is just one of the disadvantages of living in the town.
150. There are many sources of air pollution ; exhaust fumes, for example.
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.