Between heaven and earth, the source of carbon dioxide in the atmosphere is numerous. It originates in all parts of nature and cannot be ignored.

Watching the mountains, rivers and forests, the respiration and metabolism of vegetation is one of them. During the day, green plants perform photosynthesis, absorbing carbon and exhaling oxygen; at night, they do the opposite, exhaling carbon dioxide to maintain their vitality. This is a part of the natural cycle, which changes day and night without a break.

There are rivers, seas and lakes. In the water body, the living and reproduction of organisms also interact with carbon dioxide. The decomposition of microorganisms at the bottom of the water converts organic matter into carbon dioxide, which escapes in the water, or then disperses into the atmosphere. And between water and gas, there is always a material exchange, and carbon dioxide reciprocates between them, maintaining a delicate balance.

Volcanic activity is also an important source of carbon dioxide. When a volcano erupts, the hot topic of magma in the belly of the earth breaks out, and at the same time contains a large amount of carbon dioxide. These gases rise to the sky with volcanic ash and disperse into the atmosphere, affecting its composition and content.

Furthermore, in the soil, countless microorganisms are active. The decomposition of organic matter provides nutrients for microorganisms, and its metabolic products are not short of carbon dioxide. Through soil pores, it slowly rises and merges into the atmosphere.

All of these prove that carbon dioxide in the atmosphere originates from various natural sources. The intertwined sources co-shape the state of the atmosphere, which has a profound impact on ecological cycles and climate change.