coal mining

Stronghold Digital Mining (SDIG), a crypto mining company in Pennsylvania, is turning waste from old power plants into energy to power hundreds of Bitcoin mining rigs. The company collects coal refuse, a leftover waste material from the process of coal mining, and burns it in what it says is an emissions-controlled environment at its energy generation facilities. Coal refuse can cause a raft of environmental problems, such as water and air pollution, and acid mine drainage, the acidic water which comes from coal mining operations. Collecting this waste and safely disposing of it while generating power for crypto mining is a productive way of tackling the problem. The state of Pennsylvania is the third-largest producer of coal in the United States, estimates put the amount of coal wastage a...