For the past fifteen years, David has turned his attention to the area of sustainability. He believes that a systems approach to sustainability is critical—one that is based on science, and harnesses market forces to drive and fuel progress. To that end, he is the founder of the Global CO2 Initiative, a market-based solution to address one of the grand challenges of our planet: the impact of excessive CO2 emissions in our atmosphere and oceans. By investing in innovative approaches to capture and transform CO2 into commercial products, the initiative endeavors to create economically-viable solutions that offer sustained climatological benefits. Mr. David is also a Commissioner on the Energy Transitions Commission, a diverse group of global leaders from corporate, governmental, academic and non-profit backgrounds that believe the evolution of energy systems is not a single change, but is made up of many different, but inter-connected energy transitions. The group aims to inform what it will take to create credible, accelerating transitions towards universal, clean energy systems across the world.
From a science perspective, David has served on the boards of NEON, Inc. (The National Ecological Observatory Network) funded by the United States National Science Foundation, the Stroud Water Research Center, and CosmosID. Mr. David sits on the Advisory Committee of the AAAS-Lemelson Invention Ambassadors Program, a program designed to highlight the importance of invention to economic development, innovation and quality of life, globally.
Educationally, David founded erthnxt, inc., now a part of the National Wildlife Federation, whose flagship program “Trees for Wildlife” focuses on educating youth on the merits of gaining a long-term perspective. David is also a Senior Fellow at The Wharton School’s Initiative on Global Environmental Leadership (IGEL).
From a policy standpoint, David served as a Trustee of The H. John Heinz III Center for Science, Economics and the Environment. He has also been an advisor to the United States Environmental Protection Agency.
In 2007, David gave a speech to the Pacific Pension Institute’s Annual Conference entitled, “Climate Change and Its Influence on Investing: A New Perspective,”  which outlined investment opportunities brought on by a changing climate. Its approach has been used by David when making investments or serving on the boards of sustainable businesses. As such, David serves as the Chairman of ReProduct, Inc.; and as a member of the Board of Directors of CMC Energy Services, Inc.. He has served on the boards of Tangent Energy Solutions and Philadelphia Renewable Energy, Inc. David has also served as a Venture Partner and Advisor to EnerTech Capital.