Leonardo DiCaprio

Self - Narrator (voice)

Kenny Ausubel

Self

Sylvia Earle

Self

John Trudell

Self

Wangari Maathai

Self

Oren R. Lyons

Self

David Suzuki

Self

Stephen Hawking

Self

Janine Benyus

Self

Gloria Flora

Self

Michel Gelobter

Self

Mikhail Gorbachev

Self