Apparently, one of the oldest hydro-power stations in the United States is mining bitcoin. The article says:
The thing that makes this so cool to me is the fact that they're using a renewable energy source to mine bitcoin. They're probably one of the few people doing such. This kind of innovation is what will increase profitability while alleviating climate change. Bravo!The plant is now back at full capacity, generating power and selling it at market rate to National Grid at 3 cents per kilowatt-hour. Additionally, the ancient facility is currently experimenting with bitcoin mining to increase its profit margins, which allows it to make three times as much money as just selling the energy.