Coal is the most widely deposited fossil fuel on our planet. That is the reason why it plays a key role in the energy sector. Underground coal gasification (UCG) is a technique that is used in those areas where we cannot getcoal by mining. Those coal reserves having a water layer cannot be extracted by mining easily. So this technique is used where we convert coal in to gas called syngas. This is an atmosphere clean process to reduce 90% Sulphur and CO₂in the air called green technology. Thar Desert (Pakistan) has world’s 2nd largest coal reserve of 175 billion ton. In this paper energy scarcity issue in Pakistan has been addressed with focus on thermal psychiatry of Thar coal reserves. The syngas can be utilized for power generation or as feedstock in the production of liquid fuels, fertilizers, or other chemical products.Main benefit for coal gasification in underground is the fact that it is a clean form of energy, because most pollutants remain underground.