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Article | REF: G1815 V3

CO2 (carbon dioxide)

Author: Pierre LE CLOIREC

Publication date: December 10, 2022

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2. Carbon cycle

The element carbon enters a complex cycle of transformations: oxidation, reduction, biodegradation, photosynthesis... Figure 1 attempts to schematize this complex set of reactions. On purpose, CO 2 has been placed at the center of this cycle, making it possible to show either its transformations or its production. We thus find inorganic compounds such as zero-valent carbon, carbonates, bicarbonates, which show their importance in the sources and sinks regulating CO 2 in the atmosphere (cf. § 3

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