A (carbon tax) can be unpopular.Logical formLearned from15 sentences. A decrease can be in (carbon emissions).Logical formLearned from15 sentences. Cutbacks can be in emissions of (carbon dioxide).Logical formLearned from15 sentences. (Ice caps) can be constituted-of-or-filled-with (carbon dioxide).Logical formLearned from15 sentences. Cutbacks can be in (carbon dioxide).Logical formLearned from15 sentences. Carbon may be blamed for global warming.Logical formLearned from15 sentences. Legislation may place a cap on (carbon pollution).Logical formLearned from15 sentences. A (carbon footprint) may pertain-to products.Logical formLearned from15 sentences. (Carbon dioxide) may be linked to (climate change).Logical formLearned from14 sentences. (Carbon dioxide concentrations) can be increased.Logical formLearned from14 sentences. (Carbon offsets) can be voluntary.Logical formLearned from14 sentences. Some persons may die from (carbon monoxide poisoning).Logical formLearned from14 sentences. (Carbon dioxide) may undergo a separation.Logical formLearned from14 sentences. A reduction can be in emissions of (carbon dioxide).Logical formLearned from14 sentences. Carbon can be adjacent.Logical formLearned from14 sentences.