(Carbon credits) may undergo a purchase.Logical formLearned from21 sentences. A fraction may pertain-to a (carbon dioxide).Logical formLearned from21 sentences. (Carbon dioxide) can be from factories.Logical formLearned from21 sentences. Carbon may be produced.Logical formLearned from20 sentences. Carbon may undergo a conversion.Logical formLearned from20 sentences. (Carbon dioxide) may be added to the atmosphere.Logical formLearned from20 sentences. (Carbon copies) can be blind.Logical formLearned from20 sentences. Activated carbon may undergo a use.Logical formLearned from20 sentences. A (carbon tax) may undergo an imposition.Logical formLearned from20 sentences. A (carbon sequestration) can be increased.Logical formLearned from20 sentences. A (carbon copy) may pertain-to a father.Logical formLearned from20 sentences. A (carbon tax) can be provincial.Logical formLearned from20 sentences. (Carbon emissions) can be personal.Logical formLearned from20 sentences. (Carbon dioxide concentrations) may undergo a doubling.Logical formLearned from20 sentences. (Carbon dioxide) may dissolve in water.Logical formLearned from20 sentences.