(Motor vehicles) can be a source of (air pollution).Logical formLearned from5 sentences. Blood may undergo pollution.Logical formLearned from5 sentences. A technology may reduce pollution.Logical formLearned from5 sentences. (Pollution control technologies) may undergo a development.Logical formLearned from5 sentences. A (water pollution) may pertain-to a state.Logical formLearned from5 sentences. (Air pollution) can be in a town.Logical formLearned from5 sentences. Work can be on (air pollution).Logical formLearned from5 sentences. (Pollution prevention) may allow for recovery of materials.Logical formLearned from5 sentences. (Phosphorus pollution) can be constituted-of-or-filled-with water.Logical formLearned from5 sentences. A (pollution control equipment) can be advanced.Logical formLearned from5 sentences. An act can be constituted-of-or-filled-with pollution.Logical formLearned from5 sentences. A threat can be from pollution.Logical formLearned from5 sentences. (Air pollution levels) can be in some cities.Logical formLearned from5 sentences. Agriculture can be a source of pollution.Logical formLearned from5 sentences. (Air pollution) can be from (oil refineries).Logical formLearned from5 sentences.