Food may be threatened by pollution.Logical formLearned from7 sentences. Pollution can be likely.Logical formLearned from7 sentences. Pollution can be dreadful.Logical formLearned from7 sentences. (River systems) may undergo pollution.Logical formLearned from7 sentences. Pollution can be beautiful.Logical formLearned from7 sentences. A country may have a (pollution problem).Logical formLearned from7 sentences. A reference can be to (air pollution).Logical formLearned from7 sentences. (Air pollution) can be from coal.Logical formLearned from7 sentences. A light pollution can be terrible.Logical formLearned from7 sentences. A river may suffer pollution.Logical formLearned from7 sentences. Pollution may undergo an environment.Logical formLearned from7 sentences. Pollution can be hourly.Logical formLearned from7 sentences. A person may cause pollution.Logical formLearned from7 sentences. A (noise pollution) may be suffered by thousands of residents.Logical formLearned from7 sentences. Pollution can be heavy.Logical formLearned from7 sentences.