Summaries of the papers ; Technical programme ; Division 1 : "Energy and economic development" 1.1 : Energy - economic interface 1.2 : Energy supply potential 1.3 : International and regional energy cooperation 1.4 : Energy for developing countries ; Division 2 : "Future sustainable energy supply" 2.1 : Energy supply and delivery systems and technologies 2.2 : Advanced fossil energy technologies 2.3 : Non-fossil technologies 2.4 : Social aspects of energy supply ; Division 3 : "More efficient use of energy" 3.1 : Rational energy end-use technologies 3.2 : Energy conservation and efficiency policies ; Division 4: "Energy for a better environment" 4.1 : Global environmental issues 4.2 : Innovate environmental technologies