Atmospheric (carbon dioxide) may undergo a doubling.Logical formLearned from32 sentences. Some atoms can be constituted-of-or-filled-with carbon.Logical formLearned from31 sentences. (Carbon atoms) can be adjacent.Logical formLearned from31 sentences. (Carbon dioxide levels) may undergo a doubling.Logical formLearned from31 sentences. An increase can be in (carbon emissions).Logical formLearned from31 sentences. (Carbon emissions) may rise.Logical formLearned from31 sentences. Carbon may undergo an emission.Logical formLearned from31 sentences. A cost may pertain-to (carbon emissions).Logical formLearned from31 sentences. An atmosphere can be constituted-of-or-filled-with (carbon dioxide).Logical formLearned from31 sentences. (Carbon emitters) may pertain-to the world.Logical formLearned from31 sentences. Restrictions can be on (carbon emissions).Logical formLearned from31 sentences. (Carbon dioxide emissions) may pertain-to a nation.Logical formLearned from31 sentences. (Carbon dioxide emissions) may undergo a regulation.Logical formLearned from31 sentences. A molecule can be constituted-of-or-filled-with (carbon dioxide).Logical formLearned from31 sentences. A (carbon cycling) can be global.Logical formLearned from30 sentences.