1. Food production: Green plants produce carbohydrates in the process of photosynthesis. The food produced in the C3 cycle is glucose and the food produced in the C4 cycle is pyruvic acid.
2. Animal food: Food produced in the process of photosynthesis is stored in the plant body. Animals use plants as food
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3. Energy Conversion: In this process solar energy is converted into chemical energy. Photosynthesis is the process of energy conversion on Earth.
4. Animal Respiration: Carbohydrates produced in the process of photosynthesis are used as respiratory substances.
5. Prevention of environmental pollution: In the process of photosynthesis, CO2 is taken in and O2 is released. As a result, the balance of O2 and CO2 is preserved and pollution of the environment is prevented.
6. Temperature conservation: Plants absorb solar energy during photosynthesis. It holds the temperature of the earth. As a result, the ambient temperature is tolerable.
7. Physiological growth of plants: Plants produce food through the process of photosynthesis. This food promotes physical growth of plants. So photosynthesis plays a role in the physical growth of plants.
8. Development of Human Civilization: Contribution of photosynthesis to human civilization’s essential food, materials, medicine, fuel, furniture, paper etc.
9. Producers: Green plants are producers. They produce food through the process of photosynthesis. Biodiversity is dependent on producers.
10. Medicine: Many drugs including morphine, quinine, reserpine, belladonna used in medicine are available from plants. These drugs are the result of photosynthesis.