Photosynthesis is the process by which green plants, algae and some bacteria convert light energy into chemical energy, creating organic molecules through the use of carbon dioxide and water. This conversion of light energy into chemical energy happens in organelles called chloroplasts, and it involves series of complex chemical reactions mediated by various enzymes. The primary output of photosynthesis is oxygen, which we breathe in, and the organic molecules produced by photosynthesis serve as the basis of most of the food chains and ecosystems on earth.
