The main source of carbon dioxide
Between heaven and earth, the transportation and transformation of gas is related to the life of all things. Carbon dioxide, the source of this gas in the world, is quite complicated, and here is the main point.

One of them is the combustion of various fuels. Since ancient times, people have used it widely for fire. Firewood burns in stoves, fireworks rise, and carbon dioxide escapes into the air. In later generations, coal, oil, and natural gas have become popular. In the palace, the coal in the furnace is blazing, the heating is overflowing, and there is also a lot of carbon dioxide released; above the passageway, there is a lot of noise from cars and horses, fuel-driven, and exhaust gas; as for the workshops and factories, the equipment is running, relying on fuel, and the carbon dioxide emitted is innumerable. Because of the fuel, carbon is rich, and it burns in case of fire and combines with oxidation to form carbon dioxide.

Second, the respiration of living things. From giant elephants and lions to ants and microinsects, they all need to breathe to survive. Inhaling oxygen and exhaling carbon dioxide is the common law of life. In the mountains and forests, beasts sneak and birds gather, and carbon dioxide is constantly integrated into the air between their breaths. Within the fields, grains, fruits and vegetables, although plants, breathe at night and release this gas. Fish swim in the water, and between swallowing and puking, carbon dioxide also dissolves in the water and gradually escapes.

Third, the activities of the earth. When the volcano erupts, the earth fire rushes, magma overflows, and a large amount of carbon dioxide is emitted with the heat and smoke, permeating the sky and the earth. In geothermal places, hot steam evaporates, and carbon dioxide is slowly released. And in the soil, microorganisms are active, decomposing organic matter, which also produces carbon dioxide, which rises through the pores to the atmosphere.

Fourth, the process of industrial manufacturing. For example, in the industry of metallurgy, ore smelting, in order to obtain metals, it is necessary to go through multiple processes, during which fuel combustion and chemical reactions cause carbon dioxide to be produced; or in the manufacture of cement, limestone calcination, a large amount of carbon dioxide is also generated. These industrial activities are on a grand scale and produce an astonishing amount of carbon dioxide.

There are many sources of carbon dioxide, which are related to the changes of nature and the prosperity of personnel. Only by understanding its source can we think of good strategies to maintain the earth's clear air and keep all things peaceful.