How can one convert CO2 into oxygen?

One can convert CO2 into oxygen through the process of photosynthesis, which occurs in plants and some microorganisms. During photosynthesis, plants take in carbon dioxide (CO2) from the air and water (H2O) from the soil, and using sunlight as energy, they convert these substances into oxygen (O2) and glucose (C6H12O6). This process helps to replenish the oxygen in the atmosphere and is essential for life on Earth.