An (air pollution situation) can be in a community.Logical formLearned from8 sentences. Changes can be in (air pollution).Logical formLearned from8 sentences. Costs can be constituted-of-or-filled-with (air pollution).Logical formLearned from8 sentences. An association can be between (air pollution).Logical formLearned from8 sentences. Links can be between pollution.Logical formLearned from8 sentences. (Air pollution) may undergo concentration.Logical formLearned from8 sentences. Hot spots can be constituted-of-or-filled-with pollution.Logical formLearned from8 sentences. An (air pollution agent) can be constituted-of-or-filled-with agents.Logical formLearned from8 sentences. (Pollution sources) may undergo an identification.Logical formLearned from8 sentences. A magnitude may pertain-to pollution.Logical formLearned from8 sentences. (Air pollution problems) may pertain-to a country.Logical formLearned from8 sentences. (Air pollution) may reach critical levels.Logical formLearned from8 sentences. A (pollution prevention program) can be voluntary.Logical formLearned from8 sentences. An approach can be to (pollution control).Logical formLearned from8 sentences. (Air pollution) may cause problems.Logical formLearned from8 sentences.