史蒂芬·霍金

Stephen Hawking

饰：自己

Ronald Wright

饰：Himself - Author, A Short History of Progress

Marina Silva

饰：Herself - Former Minister of the Environment, Brazil

Kambale Musavuli

饰：Himself - Friends of the Congo

Vaclav Smil

饰：Himself - Population Scientist & Author, Global Catastrophies an

Changnian Chen

饰：Himself - Professor & Chen Ming`s Father

Raquel Taitson-Queiroz

饰：Herself - Environmental Police Officer, IBAMA

Daniel Povinelli

饰：Himself - Behavioral Scientist

大卫·铃木

David Suzuki

饰：Himself

珍·古道尔

Jane Goodall

饰：Herself

玛格丽特·阿特伍德

Margaret Atwood

饰：Herself

Colin Beavan

Colin Beavan

饰：Himself

克莱格·文特尔

J. Craig Venter

饰：Himself

Simon Johnson

Simon Johnson

饰：Himself

Joel Bellenson

饰：Self - Appearance

Philip Fearnside

饰：Self - Appearance

Zhang Ning

饰：Self - Appearance

Michael E. Capuano

饰：Self - Representative, Massachusetts,(archive footage)

Ted Nordhaus

饰：Self - Appearance

Michael Shellenberger

Michael Shellenberger

饰：Self - Appearance