What types of energy are there?

1. According to whether it is processed or not, it is divided into three categories: 1, primary energy; 2. Secondary energy; 3. Terminal energy.

Second, according to the situation of human use, it can be divided into two categories: 1, conventional energy; 2. New energy.

Three, according to the degree of environmental pollution can be divided into clean energy and non-clean energy.

Four, according to the source can be divided into: 1, energy from celestial bodies outside the earth, the most important of which is solar radiation energy; 2. The energy contained in the earth itself mainly includes geothermal energy and nuclear energy; 3. Energy generated by the interaction between the earth and other celestial bodies, such as tidal energy.