Between heaven and earth, everything has its source. When it comes to the natural source of carbon dioxide, this is an important part of the ecological cycle.

The natural source of carbon dioxide, one of which is the respiration of animals and plants. All creatures in the world need to breathe to survive. Animals inhale oxygen and exhale carbon dioxide, which is the common sense of life metabolism. Although plants perform photosynthesis to absorb carbon and release oxygen, at night or in the dark, they also need to breathe and exhale carbon dioxide to meet their own needs.

The second is the activity of soil microorganisms. In the soil, there are many kinds of microorganisms, which produce carbon dioxide when decomposing organic matter. Such as fallen leaves, residual branches, and roots, after the decomposition of microorganisms, carbon elements are gradually converted into carbon dioxide and dissipated into the atmosphere.

Furthermore, volcanic eruptions are also one of the natural sources of carbon dioxide. Under volcanoes, magma surges and is rich in many chemicals. When it erupts, a large amount of carbon dioxide is ejected with magma and other eruptions and injected into the atmosphere. Although this happens occasionally, the amount of carbon dioxide released at one time is quite considerable.

There is also the exchange of water bodies. Rivers, lakes and seas are vast, and the respiration of aquatic organisms and the decomposition of organic matter produce carbon dioxide. And there is gas exchange between water and the atmosphere, in which carbon dioxide circulates continuously.

All these, the natural sources of carbon dioxide are intricate and intertwined, and they co-constitute ecological cycles, which have a profound impact on the earth's climate and ecological balance.