David Oppenheimer, Managing Director (New York), works with equity investments and greenhouse gas assets, and with North American nitrogen oxides and sulfur dioxide allowances, emission credits and offsets, and renewable energy certificates. Mr. Oppenheimer is a recognized expert in the U.S. Conventional Air Pollution programs. He participated in the U.S. EPA development of several of the rules which govern U.S. programs. Prior to joining Natsource in 1997, Mr. Oppenheimer was a consultant with MSB Energy Associates, Inc., where he worked with public sector clients on energy and environmental issues. Mr. Oppenheimer has a BA from Brown University in Religious Studies and completed graduate level classes at the University of Wisconsin-Madison.