Esraa Bani

饰：Self (Population Action International)

Albert Bartlett

饰：Self - Host

Katie Elmore

Sara Morello

饰：Self

William N. Ryerson

饰：Self (Population Media Center)

Peter Sawtell

饰：Self (Eco-Justice Ministries)

Laura S. Scott

饰：Self (author of Two Is Enough)

保罗·埃利希

Paul Ehrlich

饰：Self - Host

Martha Campbell

Martha Campbell

饰：Self (Venture Strategies)

Riane Eisler

Riane Eisler

饰：Self (Center for Partnership Studies)

Malcon Potts

饰：Self (University of California at Berkeley)

Mathis Wackernagel

饰：Self (Global Footprint Network)