Carbon-based energy sources are energy sources that are mainly composed of carbon and have energy for utilization through specific processes. Their sources are diverse, such as coal, which is buried deep in the ground and has undergone long geological changes. It is formed by the accumulation and carbonization of ancient biological remains. The quality is solid and black, the carbon content is high, and it can generate heat when burned. In the past, it was an important energy source for industry and people's livelihood.

There is also oil, which is hidden in the pores of underground rock formations and formed by ancient marine or lake organisms through complex chemical changes. Like black or dark liquids, it is flammable and can be refined to obtain gasoline, diesel, etc. It is an indispensable power source for transportation and industry.

Natural gas also belongs to this category. It is mostly associated with oil or exists independently in the ground, and its main component is methane. It is clean and efficient, with less post-combustion pollutants. It accounts for an increasing proportion of today's energy structure and is widely used in power generation, heating, cooking and other things.

Carbon-based energy has made outstanding achievements in the evolution of human civilization. It has promoted industrial prosperity and made transportation convenient. However, it has also caused environmental problems, such as carbon emissions causing global warming and air pollution. Therefore, in today's world, while relying on its ability to maintain development, it should seek innovative ways to supplement and replace clean energy, so as to achieve a harmonious coexistence of energy and the environment.