(Ozone pollution) may undergo concentrations.Logical formLearned from4 sentences. Scientists may put plumes of (air pollution).Logical formLearned from4 sentences. Plumes can be constituted-of-or-filled-with (air pollution).Logical formLearned from4 sentences. A solution can be to (air pollution).Logical formLearned from4 sentences. Pollution can be undesirable.Logical formLearned from4 sentences. A same time may reduce pollution.Logical formLearned from4 sentences. (Pollution levels) may exceed limits.Logical formLearned from4 sentences. (Pollution permits) may bestow rents.Logical formLearned from4 sentences. Pollution can be a force.Logical formLearned from4 sentences. Pollution may be caused by industry.Logical formLearned from4 sentences. A (pollution problem) can be particulate.Logical formLearned from4 sentences. A trip may generate pollution.Logical formLearned from4 sentences. An (air pollution) can be horrible.Logical formLearned from4 sentences. Pollution can be omnipresent.Logical formLearned from4 sentences. A country may suffer from (air pollution).Logical formLearned from4 sentences.