Techniques may keep pollution to a minimum.Logical formLearned from5 sentences. Pollution may raise a temperature to highs.Logical formLearned from5 sentences. An (air pollution) can be in a nation.Logical formLearned from5 sentences. A record can be on pollution.Logical formLearned from5 sentences. A (cancer cluster) may be attributed to pollution.Logical formLearned from5 sentences. A world can be free of visual pollution.Logical formLearned from5 sentences. A city can be with an (air pollution).Logical formLearned from5 sentences. Pollution may harm reefs.Logical formLearned from5 sentences. (Air pollution problems) can be abysmal.Logical formLearned from5 sentences. A record can be on (air pollution).Logical formLearned from5 sentences. Pollution may blow from coal-fired (power plants).Logical formLearned from5 sentences. Human beings may reverse pollution.Logical formLearned from5 sentences. Pollution can be as cars.Logical formLearned from5 sentences. A person may notice pollution.Logical formLearned from5 sentences. (Air pollution problems) may pertain-to an area.Logical formLearned from5 sentences.