environment medium Fill in the Blank

The largest reservoir of carbon on Earth is the _____.

  1. Atmosphere
  2. Forests
  3. Oceans
  4. Fossil fuels

Answer: Oceans

Oceans store about 38,000 gigatons of carbon, primarily as dissolved inorganic carbon, making them the largest active carbon reservoir.

Topic Biogeochemical Cycles
Exam Relevance UPSC, SSC
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