Various lake surface shots of Dave Shindler from the Freshwater Institute going into water with a diving equipment on. Underwater shot of him going down to lake bottom, surface water shot of the lake and of trees surrounding it. Several underwater shots of Dave Shindler swimming and working on an instrument at bottom of lake. Shots of rocks and of the lake grounds, of diver swimming. Various shots of Dave Shindler in motorboat on a lake near Kenora. Cut on him walking in the bush transporting his diving equipment. Cut back on him in motorboat on another lake. MLS of calm lake surrounded by trees. Various shots of a biologist in motorboat in middle of a lake mixing phosphate, nitrate and water on the bottom of the boat, of him driving motorboat around the lake, deliberately polluting it for experiences. MS of a lake with PAN on scientists' settlement.