The conference weaves between a traditional conference style (live keynote speakers, panelists and breakout sessions) with a strong online and crowd-focused approach (virtual engagement, interactive Twitter dialogues, and Open Space "unconference" session).

Keynote Speaker: Fred Krupp, President, Environmental Defense Fund

Among the plenary speakers and panelists are:

Peter Evans, former Director, Global Strategy and Analytics, General Electric; currently Vice President, Center for Global Enterprise 
Marshall Ganz, Senior Lecturer in Public Policy, Harvard University
Kate Gordon, Vice President, Next Generation
Andy Hoffman, Professor, University of Michigan
Bob Inglis, former Member of the House of Representatives (R-SC), Energy and Enterprise Initiative
Jason Jay, Director, MIT Sloan Sustainability
Karim Lakhani, Professor, Harvard Business School
Thomas Malone, Director, MIT Center for Collective Intelligence
Sergej Mahnovski, Director, NYC Mayor's Office of Long Term Planning and Sustainability
Joe Paradiso, Associate Professor of Media Arts and Sciences, MIT Media Lab
Nancy Pfund, Founder and Managing Partner, DBL Investors
Eric Pooley, Sr. Vice President, Environmental Defense Fund
Andy Revkin, Pace University Senior Fellow, NY Times Dot Earth Blogger
John Reilly, Senior Lecturer and Co-Director, MIT Sloan Joint Program on the Science and Policy of Global Change
John Sterman, Professor, MIT Sloan System Dynamics Group
Susan Hunt Stevens, Founder and CEO, Practically Green
Bina Venkataraman, Senior Advisor on Climate Change Innovation, Executive Office of the President of the United States
John Weyant, Professor, Stanford University
David Yarnold, President, National Audubon Society
Tom Zeller Jr., Knight Science Journalism Fellow