Pollution may be generated.Logical formLearned from9 sentences. Pollution may undergo an abatement.Logical formLearned from9 sentences. (Pollution levels) can be increased.Logical formLearned from9 sentences. Pollution may undergo a production.Logical formLearned from9 sentences. (Air pollution) may take a toll.Logical formLearned from9 sentences. Ways may increase (air pollution).Logical formLearned from9 sentences. Progress can be in reducing pollution.Logical formLearned from9 sentences. An (air pollution) can be extreme.Logical formLearned from9 sentences. Problems can be with (water pollution).Logical formLearned from9 sentences. Pollution may be avoided.Logical formLearned from9 sentences. Levels can be constituted-of-or-filled-with industrial pollution.Logical formLearned from9 sentences. International waters may undergo pollution.Logical formLearned from9 sentences. (Water pollution) can be in rivers.Logical formLearned from9 sentences. An (air pollution) can be in a country.Logical formLearned from9 sentences. A response can be to (air pollution).Logical formLearned from9 sentences.