Explanation
- A
Carbon captured by oceans and coastal ecosystems
Carbon stored by oceans and coastal ecosystems. Mangroves, seagrass, salt marsh — blue carbon.
- B
Carbon sequestered in forest biomass and agricultural soils
Forests and soils. That is green / terrestrial carbon.
- C
Carbon contained in petroleum and natural gas
Petroleum and gas. Fossil carbon.
- D
Carbon present in atmosphere
Atmospheric CO2. The stock in air, not ‘blue’.
Summary. Official key is (a). Blue carbon is carbon captured and stored in marine and coastal ecosystems — mangroves, tidal marshes, seagrass beds.
Same topic · past papers
UPSC has asked this before
These previous-year questions sit on the same topic. Open one to practise the earlier ask.
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