Solar energy is a renewable energy source. It refers to the radiant thermal energy of the sun (see the three modes of propagation of thermal energy: radiation), and its main manifestation is often called solar rays. Nowadays, it is typically used to generate electricity or provide energy for water heaters.
Since the birth of life on earth, it has mainly relied on the energy of thermal radiation provided by the sun. Since ancient times, humans have also known how to use sunlight to dry objects and use it as a method. to prepare food, such as making salt and drying salted fish.
Technical principle:
Solar energy is generated by the fusion of hydrogen and helium of hydrogen atoms inside the sun to release enormous energy nuclear. Most of the energy needed by humans comes directlyment or indirectly from the sun. Plants release oxygen, absorb carbon dioxide and convert solar energy into chemical energy and store it in the plant body through photosynthesis.
Reference for the above content: Baidu Encyclopedia - ? Solar energy
Solar energy has a wide application area, no pollution, strong operability and reasonable equipment cost.
Wind energy. It can be built in areas unsuitable for human habitation, such as the Gobi Desert in northwest China, without occupying agricultural land. No pollution and no danger to the public. Abundant wind energy in northwest China can be fully utilized. Kill several birds with one stone.