For most of the past 20 years, Dan has worked to build EDF’s programme in China that explores how market-based approaches can advance its emissions objectives. Dan is widely credited with developing the cap-and-trade model that the Bush Administration adopted in the early 1990’s to control sulfur dioxide in the United States. That programme succeeded in reducing emissions below target levels and at a fraction of the predicted costs. More recently, he was a member of California’s advisory committee on the cap-and-trade program for greenhouse gases, which is now in operation and delivering climate benefits.