co-produced by Frontline and Hedrick Smith Productions ; senior producer, Hedrick Smith ; producer, Marc Shaffer ; director, Rick Young ; guide written by Aruna Jain [and others]
a production of Thirteen and ArgoFilms in association with WNET.org for PBS ; written, produced and directed by Allison Argo ; executive producer, Fred Kaufman ; series producer, Bill Murphy
produced and directed by Patsy Northcutt, David Kennard ; written by Brian Thomas Swimme, Mary Evelyn Tucker ; Yale School of Forestry & Environmental Studies ; Northcutt Productions
produced and directed by Patsy Northcutt, David Kennard ; written by Brian Thomas Swimme, Mary Evelyn Tucker ; Yale School of Forestry & Environmental Studies ; Northcutt Productions
Bullfrog Films presents ; A production of Earth Image Films for Nova ; WGBH Educational Foundation ; Producer, Christopher McLeod, Robert Lewis ; writer/director, Christopher McLeod ; for NOVA, senior producer, Kathleen Bernhardt
a coproduction of Central Independent Television, Universidade Católica de Goiás, and WGBH/Boston for Frontline ; written by Adrian Cowell, Michael Kirk ; produced by Roger James ; directed by Adrian Cowell
a coproduction of Central Independent Television, Universidade Católica de Goiás, and WGBH/Boston for Frontline ; written by Adrian Cowell, Michael Kirk ; produced by Roger James ; directed by Adrian Cowell