(Power plants) may produce pollution.Logical formLearned from6 sentences. Persons may cut (air pollution).Logical formLearned from6 sentences. (Pollution levels) can be urban.Logical formLearned from6 sentences. (Pollution levels) may remain high.Logical formLearned from6 sentences. Pollution can be from a site.Logical formLearned from6 sentences. A (pollution prevention device) can be required.Logical formLearned from6 sentences. Pollution can be from cars.Logical formLearned from6 sentences. (Pollution controls) can be on industrial plants.Logical formLearned from6 sentences. A (zone pollution) can be dead.Logical formLearned from6 sentences. A surface may undergo pollution.Logical formLearned from6 sentences. (Water quality) can be constituted-of-or-filled-with pollution.Logical formLearned from6 sentences. Pollution can be a culprit.Logical formLearned from6 sentences. (Power plants) can be a source of (mercury pollution).Logical formLearned from6 sentences. (Pollution control technologies) can be advanced.Logical formLearned from6 sentences. Pollution may happen.Logical formLearned from6 sentences.