The photosynthesis process is the process by which plants, algae and many types of bacteria convert carbon dioxide into organic compounds, such as sugar by using the energy from sunlight. This sugar is glucose, which is their food. A common by-product of photosynthesis is oxygen, as both carbon dioxide and water are needed for this process to occur. This process is vital to all life on Earth. Not only does it help maintain the normal level of oxygen in the atmosphere for aerobic life (air-breathing) to live on, but also all life depends on it as a source of energy, or indirectly as source of energy in their food.
The energy consumption during photosynthesis is immense approximately 100 terawatts, which is six times larger than the power consumption of the entire human civilization. Besides providing energy and oxygen, photosynthesis is the source of carbon in all organic compounds within an organisms’ body (plant-based or animal-based).
The glucose created by photosynthesis is used as energy for plant life to grow. Oxygen is not the only benefit animal life receives from plants, as many plants are fruit bearing or medicinal bearing, or in the case of humans, are strong enough to be used as building materials to create shelter. So in addition to growing plant life and generating oxygen, photosynthesis also provides food, medicines and building materials for animals and humans.