A (carbon fiber case) can be for a look.Logical formLearned from68 sentences. (Carbon dioxide) may undergo an increase.Logical formLearned from68 sentences. Carbon may pertain-to the world.Logical formLearned from67 sentences. A source can be constituted-of-or-filled-with (carbon dioxide).Logical formLearned from67 sentences. Carbon can be global.Logical formLearned from67 sentences. (Carbon dioxide) can be gas.Logical formLearned from67 sentences. Emissions of (carbon dioxide) may increase.Logical formLearned from67 sentences. (Carbon dioxide emissions) may pertain-to persons.Logical formLearned from67 sentences. Reductions can be in (carbon dioxide).Logical formLearned from66 sentences. A (carbon dioxide) can be in the atmosphere.Logical formLearned from65 sentences. Higher levels can be constituted-of-or-filled-with (carbon dioxide).Logical formLearned from64 sentences. Tonnes can be constituted-of-or-filled-with (carbon dioxide).Logical formLearned from64 sentences. A person may reduce a (carbon footprint).Logical formLearned from64 sentences. Carbon can be sequestered.Logical formLearned from64 sentences. Isotopes can be constituted-of-or-filled-with carbon.Logical formLearned from64 sentences.