Some isotopes can be constituted-of-or-filled-with carbon.Logical formLearned from14 sentences. (Carbon compounds) can be reduced.Logical formLearned from14 sentences. (Carbon dioxide emissions) may pertain-to a company.Logical formLearned from14 sentences. Carbon may undergo a burning.Logical formLearned from14 sentences. (Carbon dioxide) can be (greenhouse gases).Logical formLearned from14 sentences. (Carbon dioxide) may be give_offed.Logical formLearned from14 sentences. Industrialized nations may reduce emissions of (carbon dioxide).Logical formLearned from14 sentences. (Fuel efficiency) can be with (carbon composite parts).Logical formLearned from14 sentences. A market can be for (carbon dioxide).Logical formLearned from14 sentences. Emissions of (carbon dioxide) may decline by some percent.Logical formLearned from14 sentences. Concerns can be about (carbon dioxide emissions).Logical formLearned from14 sentences. Plants may use (carbon dioxide).Logical formLearned from14 sentences. Limits can be on (carbon dioxide releases).Logical formLearned from14 sentences. Carbon may work.Logical formLearned from14 sentences. (Carbon dioxide levels) may double.Logical formLearned from13 sentences.