The previous edition of Energy Technology Perspectives(ETP), published in summer 2008, called for an energy technology revolution to tackle the undesirable consequences of our current patterns of energy supply and use. It also highlighted that, if we did not alter course, concerns about energy security and the threat of dangerous climate change would only become much worse. So what – if any – progress have we made over the last two years in meeting these challenges? At first sight, it may seem as though not much has changed. Countries are still discussing what a long-term climate change framework should look like,.