An (air pollution) can be toxic.Logical formLearned from179 sentences. Pollution can be high.Logical formLearned from176 sentences. A source may pertain-to pollution.Logical formLearned from175 sentences. Forms can be constituted-of-or-filled-with pollution.Logical formLearned from172 sentences. Pollution can be reduced.Logical formLearned from169 sentences. Pollution may pertain-to persons.Logical formLearned from162 sentences. Rivers may undergo pollution.Logical formLearned from158 sentences. A result can be constituted-of-or-filled-with pollution.Logical formLearned from153 sentences. Pollution can be alleged.Logical formLearned from153 sentences. Water may undergo pollution.Logical formLearned from152 sentences. Pollution can be widespread.Logical formLearned from150 sentences. An (air pollution) can be increased.Logical formLearned from148 sentences. Pollution may undergo a reduction.Logical formLearned from146 sentences. Pollution can be airborne.Logical formLearned from138 sentences. Pollution can be organic.Logical formLearned from135 sentences.