Concern can be over (carbon dioxide emissions).Logical formLearned from9 sentences. Airlines may trade (carbon permits).Logical formLearned from9 sentences. Targets can be for reducing (carbon dioxide emissions).Logical formLearned from9 sentences. A (carbon trading system) can be global.Logical formLearned from9 sentences. (Passenger cars) may make_up some percent of (carbon dioxide emissions).Logical formLearned from9 sentences. Bureaucrats may be deluged in (carbon credit).Logical formLearned from9 sentences. Cutbacks can be in some industrialized nations of emissions of (carbon dioxide).Logical formLearned from9 sentences. (Carbon dioxide) may be suspected of causing a warming of an atmosphere.Logical formLearned from9 sentences. A (carbon accumulation) may pertain-to the atmosphere.Logical formLearned from9 sentences. Coal may release (carbon dioxide).Logical formLearned from9 sentences. Regulations can be on (carbon dioxide emissions).Logical formLearned from9 sentences. (Carbon sinks) can be vital.Logical formLearned from9 sentences. Growth can be in (carbon emissions).Logical formLearned from9 sentences. Victims may succumb to (carbon monoxide poisoning).Logical formLearned from9 sentences. A country can be (carbon polluters).Logical formLearned from9 sentences.