Energy for Sustainable Development – Bulgaria Ltd. (ESD Bulgaria Ltd.) is a 100% private company, registered in March 1998 under the Trade Law of the Republic of Bulgaria. ESD-Bulgaria Ltd. operates mainly in the field of energy efficiency (EE), Green House Gas (GHG) emission trading, Combined Heat and Power (CHP) and Renewable Energy Sources (RES), as a consulting company and engages in the development and implementation of sustainable energy projects.