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Explain with suitable diagram the path that carbon takes to go back to the atmosphere. You may start from plants using CO2 from the atmosphere.
Why is an excess of CO2 in the atmosphere considered undesirable even though it is required by plants?
Oceans act as the Earth's largest carbon sink, which means they:
Which process removes carbon dioxide from the air?
Burning of fuels like wood and coal adds carbon dioxide to the air and uses up oxygen.
Explain the carbon cycle in nature, naming two processes that add carbon dioxide to the air and one process that removes it.
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