Over the past few years, energy security and sustainable development have moved up the global agenda. There are two main reasons for this: first, the impact of high and often volatile energy prices; second, concerns over environmental sustainability and particularly about the global climate. Both issues are critically important for Asia and the Pacifica region in which impressive economic growth has boosted the demand for energy and put corresponding strains on the environment. The publication gives a detailed overview on available energy resources, supply and demand, financing, policy and cooperation in the regions. It also describes energy situation in least developed countries, landlocked and small island developing countries, and suggests policy options for energy security and sustainable development.