What are two main processes must carbon go through?

There are 3 main processes that carbon dioxide (co2) must go through :

Respiration -  All plants and animals are able to release energy from their food using respiration. This can also include any other living organism out there.

Combustion - This is the process of burning fuel. This releases carbon dioxide into the open space.

Photosynthesis- Any sort of green plant, such as flowers, can remove carbon dioxide from the atmosphere by using photosynthesis.