Combustion - The act of burning carbon and releasing carbon dioxide into the atmosphere, Photosynthesis - When plants take in carbon dioxide from the atmosphere to store energy, Cellular Respiration - When organisms release carbon dioxide into the atmosphere to release energy, Decomposition - When organisms die and release carbon into the earth, Ingestion - Eating or drinking, Fossil Fuel - An energy source created from decomposed matter; natural gas, oil, coal, Excretion - Pooping or eliminating waste,

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