The solar bai energy is produced by the hydrogen-helium fusion of the hydrogen atoms in the sun to release huge du nuclear energy, which is the radiant energy from the sun. Dao Most of the energy needed by human beings comes directly or indirectly from the sun. Plants release oxygen and absorb carbon dioxide through photosynthesis, and convert solar energy into chemical energy for storage in the plant.
Fossil fuels such as coal, oil, and natural gas are also primary energy sources that have evolved from ancient animals and plants buried underground over a long geological age. The energy contained in the earth itself usually refers to the energy related to the thermal energy inside the earth and the energy related to the nuclear reaction.