Mongolia's primary source of energy is coal; it is estimated that there are 173 billion tonnes of coal. Coal-fired thermal power plants accounted for a total of 96.1% of the total electricity supply in 2015; a total of 5541.74 GWh of electricity. There are quite numbers of regulations in place aimed at reducing GHG emissions by increasing renewable energy and improving energy efficiency. Such as Mongolia's 2030 Sustainable Development in energy supply related goals include: the share of power demand supplied by domestic power generation sources will be 100% by 2030, the share of renewable energy sources in total installed power capacity for domestic supply will be 30% by 2030, the use of nuclear energy for electricity and heat generation for the period 2025-2030. Mongolia's Renewable Energy Law was approved in 2007 and renovated in 2015. Its purpose is to regulate the generation and delivery of power from renewable energy resources and to encourage the development of privately financed power projects by setting up the legal framework that will allow electricity from Renewable energy to be bought. One of the main factors which are contributing to energy usage is heat loss in buildings. Green Development Policy aims to decrease heat loss by 40% by 2030 by insulation improvements for existing buildings and the implementation of new energy-efficient standards for new buildings. The Energy Conservation (EC) Law of Mongolia was approved by the Parliament on 26 November 2015. The EC Law mandates large energy consumers to undergo an energy audit and to report annually