The World Energy Perspective ENERGY EFFICIENCY: A STRAIGHT PATH TOWARDS ENERGY SUSTAINABILITY is the 8th report in the series of triennial reports produced by the Council together with ADEME and it is the most comprehensive global publication in the area of energy efficiency policies. Drawing on the experiences and lessons from the research conducted in more than 95 countries around the world, the report presents and evaluates different approaches to energy efficiency policies adopted in these countries and helps identify policies which work well and those which do not.