Allison Argo, the filmmaker behind Frogs: The Thin Green Line, discusses the making of the film in this Web-exlusive video. From the construction of an artificial pond set, to seeing the effects of the chytrid fungus first-hand, Allison describes the challenges she encountered in this project. With one-third of amphibian species threatened with extinction, Allison thinks the story of frogs is probably the most important environmental story of our time.The film comes from:PBS