Season 22, Episode 4
Season 22 Episode 2204 | 29m 14s
Juniper Control - Millions of acres of western juniper suck the desert dry in eastern Oregon. Beavers Assisted Restoration - Scientists enlist invisible helpers, beaver, to restore creeks and save salmon. Fish Screens - A flood disaster leads to the invention of a new fish screen design.
Aired: 10/28/10Video has closed captioning.