Leonardo DiCaprio
Self - Narrator (voice)
Acting
Kenny Ausubel
Self
Directing
Sylvia Earle
Self
Acting
John Trudell
Self
Acting
Wangari Maathai
Self
Acting
Oren R. Lyons
Self
Acting
David Suzuki
Self
Acting
Stephen Hawking
Self
Acting
Janine Benyus
Self
Acting
Gloria Flora
Self
Acting
Michel Gelobter
Self
Acting