(Pollution sources) can be man-made.Logical formLearned from3 sentences. Pollution may travel.Logical formLearned from3 sentences. A meteorology may loft pollution.Logical formLearned from3 sentences. Pollution may be associated with (climate change).Logical formLearned from3 sentences. Activities may contribute to pollution.Logical formLearned from3 sentences. (Pollution problems) can be in areas.Logical formLearned from3 sentences. Problems may be associated with pollution.Logical formLearned from3 sentences. (Pollution sources) may undergo a monitoring.Logical formLearned from3 sentences. (Air pollution) can be in national parks.Logical formLearned from3 sentences. Pollution can be from countries.Logical formLearned from3 sentences. An (air pollution exposure) can be short-term.Logical formLearned from3 sentences. (Air pollution) can be on human health.Logical formLearned from3 sentences. (Pollution prevention) may be used.Logical formLearned from3 sentences. Pollution may come from a combustion of fuels.Logical formLearned from3 sentences. Relationships can be between pollution.Logical formLearned from3 sentences.