Proximity can be to (pollution sources).Logical formLearned from4 sentences. (Lung function) may be associated with (air pollution).Logical formLearned from4 sentences. (Air pollution) can be on health.Logical formLearned from4 sentences. (Air pollution) may exacerbate asthma to chemicals.Logical formLearned from4 sentences. (Air pollution) can be among children.Logical formLearned from4 sentences. Systems can be for (air pollution control).Logical formLearned from4 sentences. Some type of pollution can be a release of gases.Logical formLearned from4 sentences. A type of (air pollution) can be a release of particles.Logical formLearned from4 sentences. Pollution can be by heavy metals.Logical formLearned from4 sentences. Revenues can be from (pollution charges).Logical formLearned from4 sentences. (Air pollution levels) can be daily.Logical formLearned from4 sentences. Pollution can be on a border.Logical formLearned from4 sentences. Persons may talk about (air pollution).Logical formLearned from4 sentences. (Water pollution problems) may pertain-to a nation.Logical formLearned from4 sentences. A contribution can be to pollution.Logical formLearned from4 sentences.