This article seeks to evaluate the impact of India and China on world energy markets by setting their future energy demands, principally for coal and oil, in the context of their domestic supply potential. After examining their approach to energy efficiency, the author concentrates on their energy diplomacy and the way in which they have sought to enhance their security of supply by targeting exporting countries, often those with a somewhat fraught relationship with the west. He concludes that it is in their interest to further strengthen their co-operation and avoid competition which simply drives up the price they pay for oil.