(Carbon dioxide concentrations) may increase.Logical formLearned from9 sentences. (Carbon dioxide) may be emitted to the atmosphere.Logical formLearned from9 sentences. A (carbon standard) can be voluntary.Logical formLearned from9 sentences. A person may get (carbon dioxide).Logical formLearned from9 sentences. Targets can be for emissions of (carbon dioxide).Logical formLearned from9 sentences. A country may buy (carbon credits) on an international market.Logical formLearned from9 sentences. (Carbon dioxide emissions) can be responsible in part.Logical formLearned from9 sentences. A female may refer to (carbon dioxide emissions).Logical formLearned from9 sentences. A man may die of (carbon monoxide poisoning).Logical formLearned from9 sentences. (Carbon dioxide) may be discharged into the atmosphere.Logical formLearned from9 sentences. (Carbon dioxide emissions) may undergo a rise.Logical formLearned from9 sentences. A (carbon footprint) may pertain-to an industry.Logical formLearned from9 sentences. A (carbon cap-and-trade program) can be mandatory.Logical formLearned from9 sentences. Coal may emit (carbon dioxide).Logical formLearned from9 sentences. Carbon can be into the atmosphere.Logical formLearned from9 sentences.