Deep geothermal energy (DGE) involves harnessing the thermal energy stored deep within the Earth's crust for electricity generation. It is a renewable, low carbon, and long-lasting source of energy that some experts estimate could generate up to 10% of the UK and USA's electricity needs. Commercial deep geothermal projects are currently being developed in countries like Australia and Germany, and former mining regions in the UK like Cornwall, Yorkshire, and the Northeast could also support viable commercial projects.