(Carbon fiber) may be used.Logical formLearned from9 sentences. Researcher may make measurements of properties of (carbon nanotubes).Logical formLearned from9 sentences. Wings may be constructed from (carbon fiber).Logical formLearned from9 sentences. A (carbon copy) may pertain-to a person.Logical formLearned from9 sentences. An impact can be on a (carbon footprint).Logical formLearned from9 sentences. Persons may use (carbon fluorescent light bulbs).Logical formLearned from9 sentences. Leaders may pertain-to carbon.Logical formLearned from9 sentences. (Carbon fluorescent light bulbs) can be twisty.Logical formLearned from9 sentences. A company can be with a (carbon footprint).Logical formLearned from9 sentences. (Temperate forest) may store carbon.Logical formLearned from9 sentences. A (carbon fiber fender) can be for nighttime.Logical formLearned from9 sentences. (Carbon dioxide emissions) can be into the atmosphere.Logical formLearned from9 sentences. A country may introduce a (carbon tax).Logical formLearned from9 sentences. (Carbon dioxide) may undergo a lynching.Logical formLearned from9 sentences. Head may cover increases concentration of (carbon dioxide) of oxygen.Logical formLearned from9 sentences.