(Carbon dioxide) may contribute to global warming.Logical formLearned from52 sentences. An increase can be in atmospheric (carbon dioxide).Logical formLearned from51 sentences. Carbon can be terrestrial.Logical formLearned from51 sentences. Carbon can be in the atmosphere.Logical formLearned from51 sentences. An increase can be in atmospheric (carbon dioxide).Logical formLearned from50 sentences. A price can be for carbon.Logical formLearned from50 sentences. A mixture can be constituted-of-or-filled-with (carbon monoxide).Logical formLearned from50 sentences. Sources can be constituted-of-or-filled-with (carbon dioxide).Logical formLearned from50 sentences. (Carbon nanotubes) may undergo a use.Logical formLearned from49 sentences. (Carbon dioxide levels) can be elevated.Logical formLearned from49 sentences. A (carbon tax) can be global.Logical formLearned from49 sentences. A (carbon monoxide) can be poisonous.Logical formLearned from49 sentences. (Carbon dioxide) can be in an atmosphere.Logical formLearned from49 sentences. (Carbon dioxide) may increase.Logical formLearned from49 sentences. Carbon may be released.Logical formLearned from48 sentences.