A lot of future technologies that the world is counting on to make the world a greener place rely on a handful of metals most people have never heard of. From Michael Klare at tomdispatch.com:
The Post-Petroleum Resource Race and What to Make of It
Thanks to its very name — renewable energy — we can picture a time in the not-too-distant future when our need for non-renewable fuels like oil, natural gas, and coal will vanish. Indeed, the Biden administration has announced a breakthrough target of 2035 for fully eliminating U.S. reliance on those non-renewable fuels for the generation of electricity. That would be accomplished by “deploying carbon-pollution-free electricity-generating resources,” primarily the everlasting power of the wind and sun.
With other nations moving in a similar direction, it’s tempting to conclude that the days when competition over finite supplies of energy was a recurring source of conflict will soon draw to a close. Unfortunately, think again: while the sun and wind are indeed infinitely renewable, the materials needed to convert those resources into electricity — minerals like cobalt, copper, lithium, nickel, and the rare-earth elements, or REEs — are anything but. Some of them, in fact, are far scarcer than petroleum, suggesting that global strife over vital resources may not, in fact, disappear in the Age of Renewables.
To appreciate this unexpected paradox, it’s necessary to explore how wind and solar power are converted into usable forms of electricity and propulsion. Solar power is largely collected by photovoltaic cells, often deployed in vast arrays, while the wind is harvested by giant turbines, typically deployed in extensive wind farms. To use electricity in transportation, cars and trucks must be equipped with advanced batteries capable of holding a charge over long distances. Each one of these devices uses substantial amounts of copper for electrical transmission, as well as a variety of other non-renewable minerals. Those wind turbines, for instance, require manganese, molybdenum, nickel, zinc, and rare-earth elements for their electrical generators, while electric vehicles (EVs) need cobalt, graphite, lithium, manganese, and rare earths for their engines and batteries.