.The world in the early days are hot magma. Pounding hit by a meteor at any time. Elements of the heavy elements such as iron and nickel sank down into the core of the earth. While the lighter elements such as silicon floating up into the shell.As hydrogen, carbon dioxide, and water vapor. Try to insert from the surface into the atmosphere. When the cool down shell crystallization mineral and rocks. Vapor in the air condenses the rain. Rainwater dissolved carbon dioxide down to accumulate on the surface.Two billion years later, the evolution of organisms. Be frozen carbon dioxide in air photosynthesis, make food and energy, and then release the productivity is oxygen. Oxygen gas rising into the atmosphere.And combines with the oxygen atom pairs, existing become ozone gas Which to prevent harm from UV radiation. Since then, the creatures on the is multiplied.The proportion of organisms such as plants and animals as the controlled factors and carbon dioxide ออกซิเจนใน atmosphere. And control the greenhouse effect to be in equilibrium.
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