A battle can be over pollution.Logical formLearned from5 sentences. Pollution may diminish.Logical formLearned from5 sentences. A world-city may choke (air pollution).Logical formLearned from5 sentences. Concerns can be about (pollution levels).Logical formLearned from5 sentences. An (air pollution) can be a source of concern.Logical formLearned from5 sentences. (Pollution busters) may pertain-to a country.Logical formLearned from5 sentences. A (target date) can be for (climate pollution reductions).Logical formLearned from5 sentences. (Climate pollution reductions) may pertain-to a country.Logical formLearned from5 sentences. Pollution can be for hauling fuel.Logical formLearned from5 sentences. Micro-particles may be associated with (air pollution).Logical formLearned from5 sentences. Worries can be over an (air pollution).Logical formLearned from5 sentences. Deaths may be linked to urban (air pollution).Logical formLearned from5 sentences. (Air pollution) can be a worry.Logical formLearned from5 sentences. A country may tackle (air pollution).Logical formLearned from5 sentences. Concern can be over (noise pollution).Logical formLearned from5 sentences.