The coast of Ulsan, a major industrial city in the southeast, was once a site where pods of gray whales were easily spotted, a scene that has become rare as marine pollution and whale hunts took a toll. Among the factors that made the whales disappear, the marine waste issue was what inspired Byun Eui-hyun, CEO of Usisan, to start a business to help clean up the ocean and save the endangered largest animal on Earth f...