On the Main Sources of Carbon Dioxide
On the main sources of carbon dioxide in the world, there are many opinions. Looking at it all, there are roughly three sources.

First, the combustion of fuel. Since ancient times, human beings have used fire increasingly. Firewood, coal, and petroleum fuels, when burned, carbon and oxygen are synthesized to produce carbon dioxide. Looking at today, the rise of industry, the roar of machines, and the burning of coal and fuel for energy, the emission of carbon dioxide is huge. And people's cooking, cars and boats also rely on these fuels, and the daily emission of carbon dioxide is incalculable.

Second, the breathing of living things. All kinds of creatures in the world, whether they fly, dive, or plant, need to breathe to survive. Inhaling oxygen and vomiting carbon dioxide is a common way of life. Huge biological groups perform this breathing thing day and night, and the carbon dioxide produced adds up and adds up, which is also an important source.

Third, the change of land use. Mountain forests are cut down and turned into fields, and wetlands are dried up and turned into land. Ecological changes have far-reaching implications. If vegetation is reduced, the ability to absorb carbon dioxide is weak; if the land is turned over, the carbon stored in the soil is gradually released and turned into carbon dioxide into the atmosphere.

All three are the main sources of carbon dioxide. Knowing their sources, we can know how to control and reduce them to protect the atmosphere and ecological security.