Complaints can be about pollution.Logical formLearned from22 sentences. Opportunities can be for (pollution prevention).Logical formLearned from22 sentences. Pollution may pertain-to a country.Logical formLearned from22 sentences. Pollution may undergo a generation.Logical formLearned from22 sentences. A battle can be against pollution.Logical formLearned from22 sentences. A land may undergo pollution.Logical formLearned from22 sentences. Pollution may undergo concentrations.Logical formLearned from22 sentences. Pollution can be physical.Logical formLearned from22 sentences. (Pollution control equipment) may undergo an installation.Logical formLearned from22 sentences. Pollution may be linked to global warming.Logical formLearned from22 sentences. An atmosphere may undergo pollution.Logical formLearned from22 sentences. Curbs can be on pollution.Logical formLearned from22 sentences. Pollution can be severe.Logical formLearned from22 sentences. (Slight pollution) may be reported in some cities.Logical formLearned from21 sentences. (Air pollution) can be serious.Logical formLearned from21 sentences.