莱昂纳多·迪卡普里奥
Leonardo DiCaprio
饰：自己
米哈伊尔·谢尔盖耶维奇·戈尔巴乔夫
Михаил Сергеевич Горбачёв(
饰：自己
Kenny Ausubel
饰：Himself - Founder, Bioneers
Thom Hartmann
饰：Himself - Author, The Last Hours of Ancient Sunlight
Sandra Postel
饰：Herself - Director, Global Water Policy Project
史蒂芬·霍金
Stephen Hawking
饰：Himself - Lucasian Professor of Mathematics, Cambridge Universit
Andrew C. Revkin
饰：Himself - Author & Science Reporter, New York Times
Paolo Soleri
饰：Himself - Architect, Founder of Arcosanti
万加丽·马萨伊
Wangari Maathai
饰：Herself - Founder, Greenbelt Movement, 2004 Nobel Peace Prize La
Paul Stamets
Paul Stamets
饰：Himself - Mycologist, Author, Mycelium Running
David Orr
David Orr
饰：Himself - Chair, Environmental Studies Program, Oberlin College
Oren Lyons
Oren Lyons
饰：Himself - Faithkeeper, Turtle Clan, Onondaga Nation, Haudenosaun
希尔维亚·厄尔
Sylvia Earle
饰：Herself - Oceanographer, Explorer-in-Residence, National Geograp
Janine Benyus
Janine Benyus
饰：Herself - Author, Biomimicry
Stuart Pimm
Stuart Pimm
饰：Himself - Professor of Conservation Ecology, Duke University
James Woolsey
饰：自己
大卫·铃木
David Suzuki
饰：自己
Joseph Tainter
Joseph Tainter
饰：Self - Author, The Collapse of Complex Societies
Brock Dolman
Brock Dolman
饰：Self - WATER Institute Director, Occidental Arts & Ecology Center
Sheila Watt-Cloutier
饰：Self - International Chair, Inuit Circumpolar Conference
Wallace J. Nichols
饰：Self - Senior Scientist, The Ocean Conservancy
Andrew Weil
饰：Self - Director, Program for Integrative Medicine, University of Arizona
Thomas Linzey
饰：Self - Executive Director, Community Environment Legal Defense Fund
Leo Gerard
饰：Self - President, United Steel Workers International Union
Peter Warshall
饰：Self - Ecologist, Whole Earth Catalogue
Andrew Revkin
Andrew Revkin
饰：Self - Author & Science Reporter, New York Times,(as Andy Revkin)
Wes Jackson
Wes Jackson
饰：Self - President, The Land Institute
Richard Heinberg
Richard Heinberg
饰：Self - Author, The Party's Over: Oil, War and the Fate of Industrial Societies
Peter de Menocal
Peter de Menocal
饰：Self - Associate Professor, Lamont-Doherty Earth Observatory, Columbia University,(as Peter Demenocal)
Ray Anderson
饰：Self - Founder, Interface, Inc.
Theo Colborn
饰：Self - President, The Endocrine Disruption Exchange
Tzeporah Berman
饰：Self - Campaign Director & Founder, Forest Ethics
Herman Daly
饰：Self - Professor, University of Maryland, Former Senior Economist, World Bank
Wade Davis
饰：Self - Explorer-in-Residence, National Geographic Society
John Todd
John Todd
饰：Self - Ecological Designer
Andy Lipkis
Andy Lipkis
饰：Self - President & Founder, Tree People