A trade can be in (carbon credits).Logical formLearned from12 sentences. Suicide can be by (carbon monoxide poisoning).Logical formLearned from12 sentences. A gesture may reduce a (carbon footprint).Logical formLearned from12 sentences. A levy can be on (carbon emissions).Logical formLearned from12 sentences. Increases can be in (carbon dioxide levels).Logical formLearned from12 sentences. A price can be for carbon.Logical formLearned from12 sentences. (Carbon dioxide) may accumulate.Logical formLearned from12 sentences. A (carbon market) may pertain-to the world.Logical formLearned from12 sentences. A cloud can be constituted-of-or-filled-with (carbon monoxide).Logical formLearned from12 sentences. (Carbon atoms) may undergo a discovery.Logical formLearned from12 sentences. A price can be on (carbon pollution).Logical formLearned from11 sentences. (Carbon sinks) may pertain-to the earth.Logical formLearned from11 sentences. (Carbon dioxide) can be in oceans.Logical formLearned from11 sentences. Carbon can be compressed.Logical formLearned from11 sentences. A source may pertain-to a (carbon dioxide).Logical formLearned from11 sentences.