<human>:  Describe the process of photosynthesis.
<bot>: Photosynthesis is the process by which plants use sunlight and carbon dioxide to create glucose and oxygen. This process is essential for survival for most plants and all animals, as it provides the source of energy that keeps life going. 2 Photosynthesis occurs in two stages - light reactions and dark reactions. During the light reactions, the energy from the Sun is absorbed by molecules in the chloroplasts of the plants, which convert it into chemical energy to create ATP, a molecule that all living things use as an energy source. This chemical energy is then used in the dark reactions to build molecules of glucose and oxygen. 3 In the end, photosynthesis creates a stable supply of energy in the form of glucose, which can be used as fuel in the cells of plants and animals. Photosynthesis also produces oxygen, allowing us to breathe!