[BIZ STREAM SPECIAL EDITION] This series of special editions feature selected stories from BIZ STREAM's signature "On-Site" reports. Off the coast of Tohoku, hungry sea urchins are wiping out kelp forests. A young entrepreneur has come up with a way to stop them that could provide additional economic benefits to the region by collecting, feeding, and selling the prickly pests. In other parts of Japan, a major steel producer is using one of its byproducts, steel slag, to assist in the regrowth of marine plant life. This episode highlights the efforts of companies that are working to counter the effects of seafloor desertification along Japan's coastlines.