Aluminum   $ 2.1505 kg        |         Cobalt   $ 33.420 kg        |         Copper   $ 8.2940 kg        |         Gallium   $ 222.80 kg        |         Gold   $ 61736.51 kg        |         Indium   $ 284.50 kg        |         Iridium   $ 144678.36 kg        |         Iron Ore   $ 0.1083 kg        |         Lead   $ 2.1718 kg        |         Lithium   $ 29.821 kg        |         Molybdenum   $ 58.750 kg        |         Neodymium   $ 82.608 kg        |         Nickel   $ 20.616 kg        |         Palladium   $ 40303.53 kg        |         Platinum   $ 30972.89 kg        |         Rhodium   $ 131818.06 kg        |         Ruthenium   $ 14950.10 kg        |         Silver   $ 778.87 kg        |         Steel Rebar   $ 0.5063 kg        |         Tellurium   $ 73.354 kg        |         Tin   $ 25.497 kg        |         Uranium   $ 128.42 kg        |         Zinc   $ 2.3825 kg        |         
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Edinburgh-based company Gravitricity has announced its plans to develop underground gravity energy storage projects for deep mine operators in Slovenia, Germany, the Czech Republic, and Finland This innovative approach repurposes end-of-life mine shafts, which would otherwise face expensive infilling and decommissioning costs

Gravitricity’s energy storage system, known as GraviStore, utilizes heavy weights—up to 12,000 tonnes—suspended in deep shafts by cables attached to winches


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