Photosynthesis plays a critical role in producing and maintaining the oxygen content of the Earth's atmosphere, and it supplies most of the biological energy necessary for complex life on Earth. [2] Some organisms also perform anoxygenic photosynthesis , which does not produce oxygen. Photosynthesis is a vital biological process that sustains almost all life on Earth by converting light energy into chemical energy. This process occurs in plants, algae, and some bacteria, enabling them to create organic molecules like glucose from simple inorganic substances. By releasing oxygen, photosynthesis also supports animal and human life, playing a major role in ecological balance and global food supply. Photosynthesis Definition Photosynthesis is the process by which green plants ... Photosynthesis is a complex and natural process, where green plants, algae, and certain bacteria convert sunlight (light energy), carbon dioxide, and water into glucose (chemical energy) and oxygen. Photosynthesis uses sunlight along with carbon dioxide and water to produce glucose and oxygen. The produced oxygen is released into the atmosphere while glucose is used as chemical energy by the plant. Photosynthesis , in short, is the process of food-making by the plants for their energy ... Photosynthesis is the process in which a plant uses sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar . Photosynthesis can be influenced by a variety of environmental factors, including temperature and light intensity.