A level of (carbon dioxide) may double.Logical formLearned from11 sentences. (Carbon emissions) may increase.Logical formLearned from11 sentences. A (carbon trading scheme) can be planned.Logical formLearned from11 sentences. A (carbon price) can be fixed.Logical formLearned from11 sentences. Carbon may sink.Logical formLearned from11 sentences. (Carbon fuels) may industry-big oil.Logical formLearned from11 sentences. A person may save some pounds of (carbon dioxide).Logical formLearned from11 sentences. (Carbon storage) can be in forests.Logical formLearned from11 sentences. (Carbon credits) may pertain-to a person.Logical formLearned from11 sentences. Green carbon may occur in natural forests.Logical formLearned from11 sentences. Carbon can be in oceans.Logical formLearned from11 sentences. Caps can be on carbon.Logical formLearned from11 sentences. (Carbon dioxide levels) can be high.Logical formLearned from11 sentences. Restrictions can be on emissions of (carbon dioxide).Logical formLearned from11 sentences. (Carbon concentrations) can be in the atmosphere.Logical formLearned from11 sentences.