Clean coal refers to the process of reducing carbon emissions and other harmful pollutants generated by the burning of coal for power generation to the minimum possible level. Supercritical (SC) and ultra-supercritical (USC) pulverised coal combustion and integrated gasification combined cycle (IGCC) technologies are examples of clean coal technologies that are widely used in new-build coal-fired power plants. These technologies improve the steam pressure and temperature requirements for operating the plants, thereby resulting in improved thermal efficiencies and consequently lower carbon emissions. In addition, carbon capture and storage (CCS) is capable of reducing carbon emissions by 80 – 90%.