"On the Causes and Sources of Carbon Dioxide"

Between heaven and earth, all things metamorphose, and carbon dioxide, which exists in the world, has its own cause and source.

The generation of carbon dioxide is first and foremost in the breathing of living things. All living beings need to inhale the breath and exhale the turbid air. Among this turbid air, carbon dioxide is the most important. This is the case from tiny insects to huge beasts. Human breathing, day and night, every time you breathe, carbon dioxide is dispersed in the air. The same is true for beasts in the mountains and forests, and birds in the water. This is the norm of nature, and it is inevitable for living things to maintain life.

Furthermore, burning is also an important source of carbon dioxide. The burning of firewood is common in the countryside. Farmers cook and earn their wages from firewood. When the fire is raging, thick smoke rises, much of which contains carbon dioxide. As for coal, oil and other materials, this is the energy that the earth has hidden over time. Today's people, for convenience, are widely used. In factories, boilers are running, coal is burned for heating and power generation, black smoke is billowing, and a large amount of carbon dioxide is gushing out. On cars and ships, fuel oil is started, and it travels thousands of miles. It also emits a lot of carbon dioxide into the atmosphere.

And there are all kinds of activities in the earth, which also generate carbon dioxide. Volcanoes erupt, earth-shaking, and when hot magma gushes out, a lot of carbon dioxide is ejected with volcanic ash, filling the wilderness. In the underground hot springs, hot steam evaporates, which also carries carbon dioxide, slowly escaping on the surface.

Overall, it can be seen that the cause and source of carbon dioxide involve a wide range of biological, combustion, and terrestrial activities. The things in the world are related to each other. Although carbon dioxide is small, it is between heaven and earth, and it involves a wide range and has a huge impact.