Did you know that seaweed absorbs way more CO2 than rainforests, but unfortunately billions of tonnes are washing up on beaches in the Gulf of Mexico because of our changing climate. This week on The Biofriendly Podcast we take the plunge into a bizarre 'Roomba meets Pac-man' device designed to collect seaweed and sink it to the bottom of the ocean, and we are pleasantly surprised when a cast of famous characters turn up on this episode.