I would like to think about the existence of soil, which is important for the plants and living things that live on the earth. During the birth of the earth, magma that has stored heat is born (see blog episode 404 for the birth of the earth), and volcanoes are formed as a result of the activity of the magma. When magma erupts from the surface of the earth, lava is released into the atmosphere, which cools down and turns into stone, which falls to the surface. The stone is weathered and turns into sand due to radiation from the sun and the weather. These sand grains become the basis of soil. When plants live in the soil, their leaves fall at the change of seasons, and microorganisms grow due to moisture from rain, etc., and the soil gradually turns into leaf mold. Various elements and living things are involved in the creation of soil, which grows. Fallen trees are decomposed by bacteria, and mushrooms grow due to mycorrhizal fungi that cooperate with plants. In addition, true bacteria grow and decompose animal carcasses and feces. In addition to mycorrhizal fungi, various living things live in the soil, and in particular worm swallow sand and decompose and purify it. The holes that earthworms pass through keep the soil soft and also provide space for retaining oxygen and water.
Soil is a substance necessary for plants and microorganisms to continue to live. Furthermore, the people and animals that continue to live on Earth eat plants to survive. Plants are at the base of the food chain, and plants live thanks to the soil and microorganisms. Furthermore, for humans, an environment cannot be safe unless there is a stable supply of food. Soil is an important resource for all living things on Earth. We believe that maintaining an environment in which soil can continue to live also leads to people’s peace of mind. We have explained the atmospheric circulation, water circulation, and soil circulation, which are important for maintaining life, and are important for keeping living things alive on Earth. These three circulations are the most important elements for maintaining safety and security for people who continue to live on Earth.