meaning of pollution in Longman Dictionary of Contemporary English

pollution  Pollution is the release of harmful chemicals or other materials into the environment Some types of air pollution results in acid pollution , 40 Edward A , re sludge treat- Plans for treatment works , 16 Points of investigation , 10 Pollution reference , text of , 5 ; scope of

Pollution is the presence of any substance in air, water, soil, or food which threatens the health of human, animal and plant life Pollution often results Air pollution is caused by solid or liquid particles and certain gases suspended in the air These particles and gases can come from car and truck exhaust,

POLLUTION definition: 1 damage caused to water, air, etc by harmful substances or waste: 2 damage caused to water… Learn more  Air pollution is described on a scale of 1-10 where 1 corresponds to 'Low' pollution and 10 corresponds to 'Very High' pollution using the Daily Air Quality