Activated carbon may undergo an addition.Logical formLearned from9 sentences. A source can be constituted-of-or-filled-with organic carbon.Logical formLearned from9 sentences. A (carbon pump) can be biological.Logical formLearned from9 sentences. (Carbon sources) can be terrestrial.Logical formLearned from9 sentences. Carbon can be in terrestrial ecosystems.Logical formLearned from9 sentences. (Carbon dioxide) may be returned to the atmosphere.Logical formLearned from9 sentences. A (carbon sequestration) can be biological.Logical formLearned from9 sentences. A reduction can be in a (carbon footprint).Logical formLearned from9 sentences. Components may pertain-to a global (carbon cycle).Logical formLearned from9 sentences. Carbon can be granulated.Logical formLearned from9 sentences. (Carbon nanotubes) may undergo an application.Logical formLearned from9 sentences. (Carbon concentrations) can be dissolved.Logical formLearned from9 sentences. (Carbon content) can be low.Logical formLearned from9 sentences. An increase can be in an amount of (carbon dioxide).Logical formLearned from9 sentences. Carbon may undergo a deposition.Logical formLearned from9 sentences.