The manner in which we produce and consume energy is of crucial importance to sustainable development, as energy has deep relationships with each of its three dimensions -- the economy, the environment and social welfare. These relationships develop in a fast-moving and complex situation characterised by increasing globalisation, growing market liberalisation and new technologies, as well as by growing concerns about climate change and energy-supply security. In order to make energy an integral part of sustainable development, new policies need to be developed. Such policies must strike a balance among the three dimensions of sustainable development. They must reduce our exposure to large-scale risk. The IEA has synthesised a number of experiences with policies aimed to promote sustainable development. These experiences are reported in seven subject chapters on energy supply security, market reform, improving energy efficiency, renewable energies, sustainable transport, flexibility mechanisms for greenhouse gas reductions and on non-Member countries.