Can renewable power offset bitcoin's massive energy demands?
Up in the Austrian Alps, inside two hydropower mills, a start-up called HydroMiner keeps high-power computers, CPUs, and servers running around the clock. These machines suck in a steady 600 Kilowatts of cheap hydroelectric power as they seek to mine new bitcoins — an energy-intensive process that involves solving mathematical problems by repeated trial and error. But unlike other bitcoin miners, HydroMiner says it’s minting cryptocurrencies without harming the environment or contributing to climate change.
“You need cheap energy to fuel your hardware,” says HydroMiner’s co-founder and CEO Nadine Damblon. By setting up shop next to where the electricity is produced, the start-up is able to pay only 4 to 6 euro cents per kW, racking up...