A list of "endangered elements" [1] has been published in a new report, including the rare earth elements (REEs) in particular neodymium, production of which, it is reckoned [2], will have to increase five-times to build enough magnets for the number of wind-turbines deemed necessary for a fully renewable future. Nonetheless, my rough calculations indicate that this would still take 50 100 years to implement, depending on exactly what proportion of the renewable electricity

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