Pollution may persist.Logical formLearned from6 sentences. (Sea water) may undergo pollution.Logical formLearned from6 sentences. (Health problems) may be associated with pollution.Logical formLearned from6 sentences. Pollution can be a danger.Logical formLearned from6 sentences. An (air pollution) may pertain-to a province.Logical formLearned from6 sentences. A (noise pollution) can be reduced.Logical formLearned from6 sentences. Levels can be constituted-of-or-filled-with (pollution control).Logical formLearned from6 sentences. A (pollution prevention) can be environmental.Logical formLearned from6 sentences. A type of technology can be a part of a group of (air pollution controls).Logical formLearned from6 sentences. Emissions can be from sources of (air pollution).Logical formLearned from6 sentences. Pollution can be from mills.Logical formLearned from6 sentences. Increases can be in pollution.Logical formLearned from6 sentences. Beaches may undergo pollution.Logical formLearned from6 sentences. Pollution can be unrestricted.Logical formLearned from6 sentences. (Noise pollution) can be a concern.Logical formLearned from6 sentences.