Since the development of clean energy technologies, including lithium, rare earth, including 29 who suddenly became unknown element in short supply of resources. They are called "energy key element", is the manufacture of thin film solar panels, high efficiency wind turbines, advanced electric car motors, high capacity batteries and other hardware, the core material of clean energy. So how many of these elements will determine the future of clean energy. As rarely before large-scale use, people's reserves and distribution of these elements do not understand. It has been predicted that the shortage of supply of lithium, there was some panic.glue gun With the gradual proven reserves of lithium, panic gradually subsided. However, other 28 kinds of elements?
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