pol·lu·tion 
/pəˈlu:ʃən/ noun
/pəˈlu:ʃən/ noun [noncount] 1 : the action or process of making land, water, air, etc., dirty and not safe or suitable to use
▪ industrial practices that have caused pollution of the air and water 2 : substances that make land, water, air, etc., dirty and not safe or suitable to use
▪ The tests showed high levels of pollution in the water/air. ▪ The fish are dying of/from pollution. — see also light pollution, noise pollution
▪ industrial practices that have caused pollution of the air and water
▪ The tests showed high levels of pollution in the water/air. ▪ The fish are dying of/from pollution. — see also light pollution, noise pollution
