Atmosphere:
Carbon exists as carbon dioxide (CO₂) and methane (CH₄).
Absorbed by plants and plankton for photosynthesis.
Dissolves in the ocean, forming carbonic acid.
Terrestrial Biosphere (Land):
Plants absorb CO₂; animals release CO₂ through respiration.
Animals release methane during digestion.
Decomposers in soil release carbon.
Earth's Interior (Lithosphere):
Carbon stored in fossil fuels, limestone, and natural gas.
Volcanic eruptions release carbon.
Ocean:
The largest carbon exchange area.
Absorbs CO₂ from the atmosphere.
Plankton use CO₂ for photosynthesis.
Human Influence:
Burning fossil fuels and cement production release CO₂.
Deforestation increases atmospheric carbon.
Conclusion: Carbon cycles through both living and non-living systems, and human activities are significantly altering this natural cycle.
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