02:50More or LessBig Polluters: Ships v CarsBBC World Service Duration: 9 minutes Tue 3rd Oct 2017, 02:50 on BBC World Service East and Southern AfricaAvailable for over a yearListen nowDo the largest ships emit as much pollution as all the cars in the world? Show more GenresFactualFormatsMagazines & ReviewsBrandMore or Less Source: BBC Online