Pollution can be in areas.Logical formLearned from6 sentences. (Health risks) can be from (air pollution).Logical formLearned from6 sentences. (Pollution levels) can be in lakes.Logical formLearned from6 sentences. Pollution may be caused by waste.Logical formLearned from6 sentences. (Pollution control) can be in (river valleys).Logical formLearned from6 sentences. (Slight pollution) may be witnessed in some cities.Logical formLearned from6 sentences. Pollution can be to an environment.Logical formLearned from6 sentences. Pollution may be caused by water.Logical formLearned from6 sentences. An (environment pollution) can be serious.Logical formLearned from6 sentences. Marine pollution may undergo a monitoring.Logical formLearned from6 sentences. An (air pollution control) can be urban.Logical formLearned from6 sentences. Some percent of an (air pollution) may be caused by cars.Logical formLearned from6 sentences. A world-city may face (air pollution) with some tons of lead.Logical formLearned from6 sentences. Pollution may become a concern.Logical formLearned from6 sentences. Costs can be constituted-of-or-filled-with (pollution control).Logical formLearned from6 sentences.