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Topic last updated: 09 Nov 2023

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The Earth and the early Atmosphere

4  of  4

The carbon cycle

Carbon is recycled. All carbon originally comes from carbon dioxide in the atmosphere, which enters the carbon cycle through photosynthesis. Plants use photosynthesis to make carbohydratecarbohydrate
 Energy producing organic compounds which are made of carbon, hydrogen and oxygen. Examples of food containing carbohydrate are rice, pasta, bread and potatoes s, fats and proteins using light energy.

The below diagram represents the carbon cycle.

The carbon cycle
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The modern atmosphere and global warming