(Carbon dioxide) may undergo increases.Logical formLearned from9 sentences. A part may pertain-to a global (carbon cycle).Logical formLearned from9 sentences. An organic carbon can be volatile.Logical formLearned from9 sentences. Changes can be in (carbon cycling).Logical formLearned from9 sentences. Evidence may come from a release of (carbon dioxide).Logical formLearned from9 sentences. (Carbon deposits) can be in an engine.Logical formLearned from9 sentences. (Carbon dioxide emissions) can be from mankind.Logical formLearned from9 sentences. A (carbon dioxide) can be dangerous.Logical formLearned from9 sentences. (Carbon datings) can be accurate.Logical formLearned from9 sentences. (Carbon fiber) may rise in popularity.Logical formLearned from9 sentences. A (carbon fiber) may pertain-to a male.Logical formLearned from9 sentences. A (shift carbon tax) may pertain-to a person.Logical formLearned from9 sentences. Old-growth forests can be (carbon sinks).Logical formLearned from9 sentences. (Carbon levels) may rise.Logical formLearned from9 sentences. Carbon can be fresh.Logical formLearned from9 sentences.