The main sources of black carbon in the atmosphere are
. Black carbon exists in the atmosphere, and its sources are various. The first is the burning of firewood for cooking and heating. The ancient people often used firewood for cooking, and it burned. The smoke contains a lot of black carbon, which rises in the sky and gathers in the atmosphere. And the people living in the mountains keep out the cold in winter, and the burning of firewood is endless in households. This is a source.

There are also those who burn fossil fuels, such as coal, oil, and gas. Since the industrial boom, there are many furnaces and kilns, and coal is burned for ironmaking and power generation, and fuel is used to drive ships. When coal is burned, the black matter in the flame escapes from the atmosphere, and it accumulates for a long time. It is the bulk of black carbon. Cars and boats are walking on the road, and the fuel smoke, and the gas also contains black carbon, which is between heaven and earth. This is the second source.

Furthermore, the burning of forests and fields is either due to natural disasters or man-made disasters. When the sky fires suddenly arrive, the forests continue to burn, the grass and trees are scorched, and the black smoke rises, and the black carbon is dispersed in the atmosphere with the smoke. Man-made land reclamation also involves arson and burning the forests. Where the fire starts, black carbon flies and enters the air. This is the third source.

And the burning of biomass, such as agricultural straw. Every time it is harvested, the straw is discarded, or burned in the fields to fertilize the earth. When the fire rises, the smoke rises, and the black carbon enters the atmosphere. As the years go by, it is also the source of black carbon.

Therefore, black carbon in the atmosphere originates from the burning of firewood, fossil fuels, forest fires, and straw biomass. All sources are intertwined, resulting in the gradual accumulation of black carbon in the atmosphere, which affects the climate and is related to the ecology.