Explore the photosynthesis process with detailed steps, chemical equation, and diagrams. Understand how plants convert light into energy. 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 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. PHOTOSYNTHESIS definition : 1. the process by which a plant uses carbon dioxide from the air, water from the ground, and the…. Learn more.