Light pollution can be a problem.Logical formLearned from27 sentences. Protection can be from pollution.Logical formLearned from27 sentences. Reduction can be in pollution.Logical formLearned from27 sentences. Pollution may be blamed for global warming.Logical formLearned from27 sentences. An (air pollution index) may pertain-to a world-city.Logical formLearned from27 sentences. Pockets can be constituted-of-or-filled-with pollution.Logical formLearned from27 sentences. (Pollution reductions) can be harmful to the American economy.Logical formLearned from27 sentences. Pollution can be serious.Logical formLearned from27 sentences. Pollution may be caused.Logical formLearned from26 sentences. Pollution can be from activities.Logical formLearned from26 sentences. Pollution can be present in an environment.Logical formLearned from26 sentences. Higher levels can be constituted-of-or-filled-with (air pollution).Logical formLearned from26 sentences. (Pollution controls) can be advanced.Logical formLearned from26 sentences. Sin may undergo pollution.Logical formLearned from26 sentences. A blanket can be constituted-of-or-filled-with pollution.Logical formLearned from26 sentences.