Green energy is also called clean energy. Using these energy sources to generate heat is very environmentally friendly. Green energy refers to renewable energy sources such as hydro, biomass, solar, wind, geothermal and ocean energy, which produce little pollution.

1. Wind energy

Wind is a natural phenomenon on Earth that is caused by the heat radiated by the sun. Wind energy is a non-polluting renewable energy with huge development potential, especially for coastal islands, remote mountainous areas, sparsely populated grasslands and pastures, as well as rural areas and frontiers far away from the power grid and difficult to reach in the near future, as a solution to production. It is of great significance to be a reliable way of living energy.

2. Solar energy

The sun is a huge, distant, endless source of energy, and a source of many sources of energy. Wind energy, water energy, ocean temperature difference energy, wave energy and biomass energy and some tidal energy on the earth all come from the sun. Solar energy is both primary energy and renewable energy. It is rich in resources and can be used for free, without transportation, and without any pollution to the environment.

3. Ocean energy

The sea not only provides human beings with shipping, water sources and rich minerals, but also contains huge energy. It stores solar energy and derived wind energy in the sea in the form of heat and mechanical energy, and is not as easily lost as it is on land and in the air. Ocean energy refers to the renewable energy attached to seawater. The ocean receives, stores and emits energy through various physical processes. These energy exist in the ocean in the form of tides, waves, temperature differences, salinity gradients, and currents.

4. Geothermal energy

Geothermal energy is renewable thermal energy from the depths of the earth, which originates from the decay of molten magma and radioactive substances in the earth. Its utilization can be divided into two categories: geothermal power generation and direct utilization. The reserves of geothermal energy are many times greater than the total amount currently utilized by people, and are concentrated in the margins of tectonic plates, which are also prone to volcanoes and earthquakes. Geothermal energy is renewable if the rate of heat extraction does not exceed the rate of replenishment.