The process of respiration is essential in the oxygen/carbon dioxide cycle. respiration removes from the atmosphere and produces and releases to the atmosphere.

The process is photosynthesis wherein, respiration removes oxygen from the atmosphere and produces and releases carbon dioxide into the atmosphere. Respiration process plays a key role in the environment. The mitochondria in the cells of living organisms functions in the cellular respiration . The intake of oxygen by the organisms, convert it into carbon and is released in the environment, also know as Respiration Photosynthesis.

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Carbon-14 has a half-life of 5,730 years and most igneous rock is older than that.