what are the two processes used by producers to obtain energy?>
Together, photosynthesis and chemosynthesis fuel all life on Earth. Photosynthesis occurs in plants and some bacteria, wherever there is sufficient sunlight â on land, in shallow water, even inside and below clear ice. All photosynthetic organisms use solar energy to turn carbon dioxide and water into sugar and oxygen. There is only one photosynthetic formula: CO2 + 6H2O -> C6H12O6 + 6O2. Chemosynthesis is the use of energy released by inorganic chemical reactions to produce food.