- Are a few geothermal plants all it takes to solve the US' lithium supply crunch? Geothermal technologies are on the verge of unlocking vast quantities of lithium from naturally occurring hot brines beneath places like California’s Salton Sea. Lithium is essential for lithium-ion batteries. https://interestingengineering.com/geothermal-plants-lithium-supply-crunch 8 comments energy