It provides the plant with a place for its roots to anchor and support its growing process. The soil helps the anchored roots carry water and minerals from the ground up to the stem and flower of the plants. When plants die, they decay and leave minerals in the soil for future plant life. Plants need sunlight to grow. They use energy from sunlight to change carbon dioxide and water into sugars, known as food substances.
Green plants can only make food when they have light.
During photosynthesis the plant takes in carbon dioxide to help produce food. It is really important for the air to be clean. Therefore, any smog or air pollution can block the light of the sun and slow down the production of food and eventually killing the plant. Water is one of the most important resources for all life processes on earth. There is no known living thing that can exist without water.