A problem can be pollution.Logical formLearned from4 sentences. (Air pollution) may undergo a mitigation.Logical formLearned from4 sentences. An effect may pertain-to pollution.Logical formLearned from4 sentences. A metropolitan area can be with an (ozone air pollution).Logical formLearned from4 sentences. Persons may focus on sources of pollution.Logical formLearned from4 sentences. Response can be to (mtbe pollution).Logical formLearned from4 sentences. A US-city may have incidents of (perchlorate pollution).Logical formLearned from4 sentences. (Groundwater pollution conditions) can be from (state agencies).Logical formLearned from4 sentences. A (pollution measurement) may contain estimates.Logical formLearned from4 sentences. A report may indict (state pollution watchdogs).Logical formLearned from4 sentences. Incidents can be constituted-of-or-filled-with (perchlorate pollution).Logical formLearned from4 sentences. (Groundwater pollution) can be from agriculture.Logical formLearned from4 sentences. A state may reduce pollution.Logical formLearned from4 sentences. (Air pollution) may exceed standards.Logical formLearned from4 sentences. Plants may contribute to (air pollution).Logical formLearned from4 sentences.