Moreover, together with its excellent durability, neodymium is widely applied in wind turbines and hybrid vehicles. Praseodymium metal has ultra-high strength and melting point so it is an important component in jet engines. Praseodymium is used in a special type of glass, for the manufacture of visors to protect welders and glassmakers. Scandium is used in building the framework of aircraft or spacecraft to increase strength. It is also used in high-intensity street lamps. Cerium is used in catalytic converters in vehicles due to its high chemical stability under high temperature. More importantly, it is responsible for the chemical reactions in the converter. Gadolinium compounds are the active component in various MRI contrast agents. For more applications of other rare earth elements, check "Rare-earth element#List". See also Rare-earth element Adsorption Leaching References Rare earth mines