A (pollution problem) can be long-term.Logical formLearned from5 sentences. 40s can be due to pollution.Logical formLearned from5 sentences. An amount of pollution may increase.Logical formLearned from5 sentences. (Air pollution) may be increased.Logical formLearned from5 sentences. Pollution can be overwhelming.Logical formLearned from5 sentences. Levels of pollution may increase a risk.Logical formLearned from5 sentences. Exposure to (air pollution) may go_up.Logical formLearned from5 sentences. Pollution can be in forms.Logical formLearned from5 sentences. Some premature deaths may be linked to (air pollution).Logical formLearned from5 sentences. Coverage may bring_out a paradoxical effect of reducing pollution.Logical formLearned from5 sentences. (Air pollution control efforts) may pertain-to a world-city.Logical formLearned from5 sentences. A percentage can be constituted-of-or-filled-with pollution.Logical formLearned from5 sentences. A city may meet (pollution targets).Logical formLearned from5 sentences. Some way may produce pollution.Logical formLearned from5 sentences. A talk can be about pollution.Logical formLearned from5 sentences.