An (air pollution) may cover a country.Logical formLearned from5 sentences. Advice can be on fighting pollution.Logical formLearned from5 sentences. Solutions can be for an (air pollution).Logical formLearned from5 sentences. Pollution can be corrosive.Logical formLearned from5 sentences. Skies may be tainted by pollution.Logical formLearned from5 sentences. Pollution can be by an (oil industry).Logical formLearned from5 sentences. An approach can be to reducing pollution.Logical formLearned from5 sentences. Pollution can be worst.Logical formLearned from5 sentences. Cities may undergo pollution.Logical formLearned from5 sentences. Vehicles may undergo (pollution control checks).Logical formLearned from5 sentences. Pilot may order (pollution control checks) of some vehicles.Logical formLearned from5 sentences. An (oil industry) can be for pollution.Logical formLearned from5 sentences. Radioactive pollution may pertain-to an ocean.Logical formLearned from5 sentences. Steps may combate pollution.Logical formLearned from5 sentences. Protective masks can be against pollution.Logical formLearned from5 sentences.