Global warming may be caused by (carbon emissions).Logical formLearned from9 sentences. Carbon may undergo a reduction.Logical formLearned from9 sentences. A release may pertain-to carbon.Logical formLearned from9 sentences. A mass can be constituted-of-or-filled-with carbon.Logical formLearned from9 sentences. Water may contain (carbon dioxide).Logical formLearned from9 sentences. A (greenhouse gas) can be after (carbon dioxide).Logical formLearned from9 sentences. (Carbon datings) may show that something-is-the-case.Logical formLearned from9 sentences. Research can be into (carbon sequestration).Logical formLearned from9 sentences. A bit can be constituted-of-or-filled-with carbon.Logical formLearned from9 sentences. (Carbon dioxide) may build_up.Logical formLearned from9 sentences. A (carbon tax) can be effective.Logical formLearned from9 sentences. Carbon may undergo a fusion.Logical formLearned from9 sentences. A molecule can be constituted-of-or-filled-with carbon.Logical formLearned from9 sentences. Carbon may undergo a circulation.Logical formLearned from9 sentences. A film may show carbon.Logical formLearned from9 sentences.