Part 1 Introduction and executive summary - the structure of the report: scope of the report; main conclusions and recommendations; structure of the report. Part 2 The context - prospects for energy production, usage and prices, 1995-2050: interdependent variables; constructing a scenario; population and consumption; longevity of fuel reserves; potential of renewable energy sources; fuels for transport. Part 3 Energy efficiency and conservation: households and buildings; industry; combined heat and power; transport; towards an integrated policy on energy efficiency. Part 4 Regulation: introduction - the regulatory content; regulation of the British gas industry; regulation of the British electricity industry; liberalization in European gas and electricity industries; criticisms of and proposals for the regulatory offices; conclusions and recommendations. Part 5 The environmental impact of fuel cycles - risks and perceptions: The fossil fuel cycles; nuclear power; future nuclear technologies; renewable technologies; effects on human populations; costs, risks and perceptions. Part 6 Energy supply options - to meet environmental, economic and security objectives: present fuel mix; changed needed to meet Rio commitments and Berlin expectations; balancing market forces and regulation; restraint in developing countries; policy formulation; research priorities. Part 7 Findings and recommendations: improving end-use energy efficiency; the environment and its implications for the energy mix; security of energy supply; regulation; research priorities.