Two billion years later, the evolution of life in the air, carbon dioxide gas is sticky comes photosynthesis. Food and energy production, gas, oxygen, then release is out.
Two billion years later, the evolution of life. Frozen carbon dioxide in the air to photosynthesis. Create food and energy Productivity and release the oxygen out.
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.