How We Showed the Oceans Could Clean Themselves: Boyan Slat on The Ocean Cleanup | On June 3rd 2014 .. Boyan Slat gave the long-awaited sequel to his 2012 TEDx Talk, in New York City, USA .. After researching for a year with a team of about 100 people, 19-year-old Boyan Slat finally spoke out, and presented the results .. [.WATCH.]