Environmental pollution can be an issue.Logical formLearned from5 sentences. Persons may have a (pollution problem).Logical formLearned from5 sentences. Some scientific studies may find evidence of pollution.Logical formLearned from5 sentences. (Water pollution problems) may pertain-to persons.Logical formLearned from5 sentences. (Pollution levels) may remain low.Logical formLearned from5 sentences. A stew can be constituted-of-or-filled-with pollution.Logical formLearned from5 sentences. A condition can be constituted-of-or-filled-with pollution.Logical formLearned from5 sentences. A pattern can be constituted-of-or-filled-with pollution.Logical formLearned from5 sentences. Pollution can be from urban areas.Logical formLearned from5 sentences. A contributor can be to pollution.Logical formLearned from5 sentences. (Air pollution) may manifest seriousness.Logical formLearned from5 sentences. Pollution may undergo a mitigation.Logical formLearned from5 sentences. (Pollution sources) may undergo an elimination.Logical formLearned from5 sentences. (Fuel cells) may emit pollution.Logical formLearned from5 sentences. Pollution can be in waterways.Logical formLearned from5 sentences.