There is a matter today that concerns the source of carbon dioxide in the gas. Between heaven and earth, all things live, and the change of gas is essential to the ecology. And the source of carbon dioxide is quite complex.

In the mountains and forests, although trees perform photosynthesis, absorb carbon and spit out oxygen, they are rotten wood and leaves, which are worn out over time, and under the action of microorganisms, they also release carbon dioxide into gas.

Between the markets and wells, fireworks are flourishing. In workshops, fires are burning, firewood is burning charcoal, and energy is used. In this process, carbon and oxygen are synthesized, and a large amount of carbon dioxide is released into the air. Cars and horses are powered by fuel, and engines run, which are also the source of carbon dioxide. Between shuttles, exhaust gas is diffused, increasing the amount of carbon dioxide in the atmosphere.

Furthermore, in Lake Kawazawa, the water body is connected with the atmosphere. The respiration of aquatic organisms and the decomposition of organic matter all make carbon dioxide flow between air and water, either escape from air or dissolve in water, and dynamically balance.

To observe all these ends, the source of carbon dioxide in the gas, either due to natural changes or due to the interests of personnel, must be carefully investigated in order to understand the ecological principles and seek long-term solutions.