A battle can be against (air pollution).Logical formLearned from10 sentences. Environment may undergo pollution.Logical formLearned from10 sentences. (Air pollution problems) may pertain-to a world-city.Logical formLearned from10 sentences. Some factories may cause pollution.Logical formLearned from10 sentences. Problems can be constituted-of-or-filled-with (water pollution).Logical formLearned from10 sentences. A fight can be against (water pollution).Logical formLearned from10 sentences. (Air pollution) may undergo an increase.Logical formLearned from10 sentences. Compensation can be for (oil pollution damage).Logical formLearned from10 sentences. A (transboundary air pollution) can be long-range.Logical formLearned from10 sentences. An (air pollution) can be interstate.Logical formLearned from10 sentences. Pollution can be international.Logical formLearned from10 sentences. Pollution may occur.Logical formLearned from10 sentences. (Oil pollution) can be from ships.Logical formLearned from10 sentences. A plume can be constituted-of-or-filled-with pollution.Logical formLearned from10 sentences. Physical changes may increase (air pollution).Logical formLearned from10 sentences.