The gas produced during photosynthesis is oxygen. This vital process, carried out by plants, algae, and some bacteria, converts carbon dioxide and water into glucose and oxygen in the presence of sunlight. During photosynthesis, chlorophyll in the chloroplasts captures light energy, which powers the conversion of these raw materials. The oxygen produced is released into the atmosphere as a byproduct, which is essential for the survival of aerobic organisms, including humans. Photosynthesis not only supports plant life but also plays a crucial role in maintaining ecological balance by contributing to the Earth's oxygen supply.