Space-based solar power

Solar energy  (太陽能) is a popular source of clean energy nowadays. It is less likely to pollute (污染) our environment. However, there are some disadvantages to this kind of energy. The cost of purchasing and installing (安裝) a solar energy system is fairly high. The weather condition can affect the efficiency (效率) of the solar energy system. Solarenergy cannot be collected during the night. Solar energy systems can cause pollution,even though it is much less than that of other energy sources. The installation andtransportation of solar energy systems may also lead to greenhouse gas emissions (排放).  Scientists then began to look for another way ...Read More