John Holdren

Professor of Environmental Policy & Director of the Program on Science, Technology, and Public Policy at the Harvard Kennedy School of Government

Angélique Kidjo

UNICEF Goodwill Ambassador, Singer & Songwriter

John Podesta

Founder of the Center for American Progress

Fireside Chat with John Podesta

Colin Beavan

Eco-Leader, Executive Director of The No Impact Project Author & Spokesperson

Sebastian Mallaby

Director of the Maurice R. Greenberg Center for Geoeconomic Studies and the Paul A. Volcker Senior Fellow for International Economics at the Council on Foreign Relations

The Power Law: Venture Capital and the Making of the New Future

Kandeh Yumkella

Director-General, United Nations Industrial Development Organization (UNIDO), Vienna

Michael Brune

Executive director of Rainforest Action Network and a founding board member of Oil Change International

Sam Waterston

Acclaimed Actor Known for His Roles in "Law & Order" & "Grace and Frankie"

John Replogle

CEO of Seventh Generation; Sustainable Leadership Visionary; Former President & CEO of Burt's Bees

Barbara Boxer

Former Democratic Senator of California

Angela Belcher

Materials Scientist, Biological Engineer and Professor at MIT

Daniel Pauly

Daniel Pauly is the principal investigator at the Sea Around Us Project, which studies the impact of the world's fisheries on marine ecosystems. The software he's helped develop is used around the world to model and track the ocean.

Christine Ervin

Former US Assistant Secretary of Energy; National Leader on Green Buildings & Clean Energy

Moises Naim

Distinguished Fellow at the Carnegie Endowment for International Peace

Harvey Wasserman

Journalist, Author, Democracy Activist & Advocate for Renewable Energy

Ed Gillespie

Former Counselor to the President; Former Chairman of the RNC; Top Republican Strategist

Joan Baez

Legendary Folk Musician & Human Rights Activist

M. Sanjayan

Executive Vice President & Senior Scientist at Conservation International

Karim Sadjadpour

Associate at the Carnegie Endowment; Top Expert on Iran & Middle East

Wang Tao

Resident scholar in the Energy and Climate Program based at the Carnegie-Tsinghua Center for Global Policy

Richard Lugar

Distinguished Former Senator, Senior Statesman, and Authority on Foreign Affairs

Ted Nordhaus

Author, Researcher, and Political Strategist. He is co-author of Break Through and The Death of Environmentalism.

Dmitri Trenin

Director of the Carnegie Moscow Center

Jeff Orlowski-Yang

Award-winning Filmmaker, Photographer, Entrepreneur & Climate Change Activist

Warwick J. McKibbin

ANU public policy fellow in the Crawford School of Public Policy and an adjunct professor

William G. Gale

Co-director and Economic Studies Program at the Brookings Institution

Ann Florini

Nonresident senior fellow with Foreign Policy, and a professor of Public Policy at Singapore Management University

Ted Gayer

Co-director of the Economic Studies program and the Joseph A. Pechman Senior Fellow at the Brookings Institution

Michael M. Cernea

Nonresident senior fellow in Foreign Policy

Elizabeth Ferris

Senior fellow in Foreign Policy and co-director of the Brookings-LSE Project on Internal Displacement in Washington, D.C.