The Pew Center just published a summary of many of the major clean energy policy developments of the past five years (2005 through 2009). This look back gauges progress on clean energy policy since the “10-50” Solution Workshop, sponsored by the Pew Center and the National Commission on Energy Policy (NCEP) in 2004, which convened leading experts to discuss key technologies likely to enable a low-carbon future by mid-century (50 years henceforth) and to identify the critical policies necessary in the next 10 years to enable this long-term vision.