Question

Which of the following contain carbon reservoirs? Select ALL that apply.

geosphere

biosphere

hydrosphere

atmosphere

Answer 1

All four.

- Geosphere — carbon in rocks, soils, fossil fuels (coal, oil, natural gas), carbonate minerals.
- Biosphere — carbon in living and dead organisms (plants, animals, microbes).
- Hydrosphere — dissolved inorganic carbon (CO2, bicarbonate, carbonate), dissolved organic carbon, marine sediments.
- Atmosphere — gaseous carbon (CO2, CH4).