The 1........................ describes how carbon moves through organisms, into the soil, the air and then is taken up again by animals, plants, bacteria, fungi and protists. 2. R..................... is one way in which carbon enters the atmosphere, as is combustion, the burning of materials such as fossil fuels. 3. D......................., the breakdown of dead matter, also releases carbon into the atmosphere. Carbon dioxide in the air can be converted back into useful carbon compounds during the process of 4. .....................................

t.thomas

Updated 22 days ago

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