The source of black carbon
In ancient times, everyone relied on the natural production of heaven and earth for their survival. The trees of the mountains and forests, and the grass of the wild fields, are all used. When cooking, firewood burns, smoke rises and black charcoal remains. This is the source of black carbon at the beginning.

At that time, people used firewood for cooking, and every family was like this. Every time it is cooked, in the stove, the tongue of fire licks the firewood, beeping, the firewood gradually turns into charcoal, and the black smoke rises. Its charcoal color is black and hard, although it is a leftover from cooking, it is also used for other purposes. Or it can be stored for heating in winter; or in farming, it can be scattered in the field and can fertilize the soil.

And later generations, the art of smelting iron is prosperous. Iron is an important weapon of the country, and it is necessary for people's livelihood. Where iron is smelted, the fire is raging, and a large amount of charcoal is needed as fuel. The craftsman picks the wood from the mountains and forests, fires it into charcoal, and puts it into the furnace. The charcoal is warm when burned, and the iron stone is melted and flows into iron. In this process, the black matter of charcoal is mostly scattered, and black carbon is retained in the air and in the ground.

And to the prosperity of business travel, boats and cars go back and forth. Boats and boats travel on water, which need charcoal as power; cars ride on the road, or rely on charcoal to help burn. Boat stoves and car engines consume charcoal and produce black carbon. On the banks of rivers and roads, black carbon gradually accumulates, drifts with the wind, and adheres to grass, trees, and soil.

The passage of time, the changes of the world. However, the source of black carbon is inseparable from the cooking of firewood, the smelting of iron, and the consumption of boats and cars. Although the times are different, the way to use charcoal is different, but the life of black carbon is related to the needs of people's livelihood and the prosperity of the industry. Future generations, looking at the source of black carbon, can also know the traces of the life and labor of the predecessors, and the evolution of the years.