Photosynthesis plays a vital role in the carbon cycle by converting carbon dioxide (CO2) into organic compounds like glucose using sunlight. This process occurs primarily in plants, algae, and some bacteria, where light energy is harnessed to drive the synthesis of carbohydrates from CO2 and water. As plants uptake CO2 during photosynthesis, they reduce atmospheric carbon levels, thereby mitigating climate change. Additionally, the organic compounds produced serve as energy sources for other organisms, promoting the cycling of carbon through ecosystems and supporting biodiversity.