Between heaven and earth, everything depends on the source of carbon energy to live. In the ancient times, the grass and trees were lush, and over the years, their bodies rotted and turned into the foundation of carbon energy. This carbon energy is hidden in the earth and left behind by the forest. It is the foundation of the survival of all kinds of things.

In the mountains and rivers of Guanfu, coal is buried deep, which was formed by ancient wood. Its quality is thick, and when it is burned, it generates heat. It can be cooked and cast. The ancestors were wise, knew its nature, and dug and used it to withstand the cold, and used it as utensils, so as to open the end of civilization.

There are also oil people, hidden in the underground rock formations, black and sticky. In the beginning, people did not know it well, but later wise men observed it, and it can be refined into fuel oil to drive ships and make them travel in heaven and earth. Therefore, the convenience of transportation and the prosperity of commerce all depend on this carbon energy.

As for natural gas, it is light and flammable. It is hidden in the belly of the earth, and it is also a wonder of carbon energy. If you introduce it to others, it can be used for cooking, warm, clean and efficient.

The source of carbon energy, although it is given by heaven and earth, should be used sparingly. If you use the water to fish, you do not know how to maintain it, and you will eventually run out of it. Therefore, it should be used with wisdom and supplemented by technology, so that carbon can be used by the world for a long time, and all things can be preserved.