Pollution can be outdoor.Logical formLearned from44 sentences. A (pollution control) can be environmental.Logical formLearned from44 sentences. A measure can be constituted-of-or-filled-with (water pollution).Logical formLearned from44 sentences. Pollution may contribute to global warming.Logical formLearned from44 sentences. Pollution can be in a country.Logical formLearned from43 sentences. (Air pollution) can be from sources.Logical formLearned from43 sentences. Pollution may undergo a cleanup.Logical formLearned from42 sentences. Pollution may undergo a monitoring.Logical formLearned from42 sentences. Pollution can be continued.Logical formLearned from42 sentences. An (air pollution) may pertain-to the world.Logical formLearned from42 sentences. Concern can be about pollution.Logical formLearned from42 sentences. Pollution can be from agriculture.Logical formLearned from41 sentences. Indicators can be constituted-of-or-filled-with pollution.Logical formLearned from41 sentences. Issues can be constituted-of-or-filled-with pollution.Logical formLearned from41 sentences. (Air pollution) can be a concern.Logical formLearned from41 sentences.