演职人员
Herself (Population Action International)
Esraa Bani
Himself - Host
Albert Bartlett
Himself (Earth Policy Institute)
Lester Brown
Herself (Venture Strategies)
Martha Campbell
Herself (BRAC)
Susan Davis
Himself (Population Connection)
Brian Dixon
Himself - Host
Paul R. Ehrlich
Herself (Center for Partnership Studies)
Riane Eisler
Herself (Population Media Center)
Katie Elmore Mota
Himself (Environmental writer)
John Feeney
Herself
Sara Morello
Himself (University of California at Berkeley)
Malcolm Potts
Himself (Population Media Center)
William N. Ryerson
Himself (Eco-Justice Ministries)
Peter Sawtell
Herself (author of Two Is Enough)
Laura S. Scott
Himself (Population Media Center)
Negussie Teffera
Himself (Global Footprint Network)
Mathis Wackernagel
Herself (Monterey Institute of International Studies)
Lyuba Zarsky
Himself (Population Institute)
Robert Walker