Plastic waste is an enormous environmental challenge - we're getting better at using less, and at recycling, but there's still a huge amount of plastic produced and disposed of every year. But an Australian company, backed by the CSIRO, might have just solved this problem using - of all things - seaweed.

Michael Kingsbury, co-founder and co-CEO of ULUU, talks to Sean Aylmer about the science behind the company, and the future of the business, having already raised $8 million in funding with some big celebrity backers.