A piece can be constituted-of-or-filled-with carbon.Logical formLearned from33 sentences. A (carbon tax) can be on imports.Logical formLearned from33 sentences. (Carbon monoxide) may undergo a use.Logical formLearned from32 sentences. (Carbon aerosols) can be black.Logical formLearned from32 sentences. A (carbon content) can be high.Logical formLearned from32 sentences. A (carbon tax) may undergo an introduction.Logical formLearned from32 sentences. A (carbon balance) can be global.Logical formLearned from32 sentences. A (carbon cycle) may undergo an understanding.Logical formLearned from32 sentences. Carbon may pertain-to a country.Logical formLearned from32 sentences. Persons may reduce a (carbon footprint).Logical formLearned from32 sentences. Track may pertain-to a (carbon footprint).Logical formLearned from32 sentences. A stream can be constituted-of-or-filled-with (carbon dioxide).Logical formLearned from32 sentences. Carbon may undergo an exchange.Logical formLearned from32 sentences. A source can be constituted-of-or-filled-with (carbon emissions).Logical formLearned from32 sentences. A (carbon dioxide) may be produced.Logical formLearned from32 sentences.