BI-1883
Carbon cycle and carbon sinks
Biology · Secondary 4 · Hard · Carbon cycle and carbon sinks
A large mangrove forest takes in 5000 tonnes of carbon dioxide per year by photosynthesis and releases 3000 tonnes per year by respiration and decay. Which statement best describes the role of this mangrove forest in the carbon cycle?
- It is a carbon sink because it removes more carbon dioxide than it releases.
- It is a carbon source because it releases carbon dioxide by respiration.
- It is not part of the carbon cycle because it stores carbon in wood.
- It neither adds nor removes carbon dioxide overall from the atmosphere.
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