In recent years, the concept of green energy (clean) has been no stranger to many countries around the world. Green energy is energy obtained from nature that does not pollute the environment, is sustainable and renewable ... Types of green energy, including: solar energy, wind energy, hydroelectricity , geothermal energy, tidal energy, bioenergy, hydrogen energy ... In recent years, traditional energy sources are mainly exploited as oil and gas, coal, and hydropower, but only in the next few years, these energy sources will gradually be exhausted and cannot be guaranteed for a long time. Vietnamese energy. Meanwhile, energy wastage in industrial production, construction and transportation in our country is quite common and the demand for energy is increasing.