Solar energy refers to the energy from the sun. When sunlight reaches the earth, it will be transformed into various forms of energy.
The sun heats the ground and air, the heated air rises, the air flows to form wind, and the solar energy is transformed into wind energy; The sun heats the water surface and the ground, so that part of the water evaporates. After the water vapor becomes a cloud, it falls down in the form of rain and snow and flows into rivers, and the solar energy is converted into water energy; Through the photosynthesis of plants, solar energy is transformed into chemical energy of plants... It can be said that almost all energy on the earth comes from the sun directly or indirectly.
Now, people have also invented solar cells and solar water heaters to make more direct use of solar energy.