This publication was prepared by the International Energy Agency’s Directorate of Sustainable Energy Policy and Technology, under the leadership of Bo Diczfalusy, and in co-operation with other divisions of the Agency. Markus Wråke is the project leader of Energy Technology Perspectives 2012. Antonia Gawel co-ordinated and is lead author of this report, with drafting and analytical input from a number of IEA colleagues. Cecilia Tam is lead author of the finance section and Kevin Breen provided significant data and analytical support. .