The process by which carbon is cycled through Earth’s processes is known as the carbon cycle. This cycle involves the movement of carbon among the atmosphere, oceans, soil, and living organisms. Key processes in the carbon cycle include photosynthesis, where plants absorb carbon dioxide to produce oxygen and energy; respiration, where animals release carbon dioxide back into the atmosphere; and decomposition, where microorganisms break down dead materials and release carbon. Human activities, notably the burning of fossil fuels, have significantly impacted the carbon cycle, contributing to climate change.