Pollution can be in a world-city.Logical formLearned from87 sentences. The atmosphere may undergo pollution.Logical formLearned from86 sentences. Some chinese cities may report (air pollution).Logical formLearned from85 sentences. A form can be constituted-of-or-filled-with pollution.Logical formLearned from85 sentences. An (air pollution) can be reduced.Logical formLearned from84 sentences. Decades can be constituted-of-or-filled-with pollution.Logical formLearned from77 sentences. An (air pollution) may pertain-to a country.Logical formLearned from76 sentences. An environmental pollution can be serious.Logical formLearned from75 sentences. A source can be constituted-of-or-filled-with (water pollution).Logical formLearned from74 sentences. An (air pollution) can be harmful.Logical formLearned from74 sentences. Pollution can be bacterial.Logical formLearned from73 sentences. A royal-commission can be on environmental pollution.Logical formLearned from72 sentences. Concerns can be about (air pollution).Logical formLearned from71 sentences. Problems can be constituted-of-or-filled-with pollution.Logical formLearned from70 sentences. Pollution can be permanent.Logical formLearned from69 sentences.