15:06People Fixing The WorldCool Ways of Keeping Things CoolBBC World Service Duration: 23 minutes Tue 21st Aug 2018, 15:06 on BBC World Service East and Southern AfricaAvailable for over a yearListen nowHow two inventors are trying to revolutionise the way we keep things cold Show more GenresNewsFormatsDiscussion & TalkBrandPeople Fixing The World Source: BBC Online