The shipping industry is an enormous source of pollution. Ships burn dirty fuel oil that helps contribute to the industry's global carbon emissions and even in port they continue to belch out noxious fumes that pollute the air of many of our major port cities. Tom Heap and Helen Czerski search for the solutions, from a return to sailing ships to new fuels - and even the possibility of ships being more like penguins - with a panel including:

Paddy Rodgers, Director (Chief Executive) of Royal Museums Greenwich and former CEO of Euronav

Tristan Smith, Professor of Energy and Transport, Bartlett School of Environment, Energy & Resources (UCL)

Aoife O’Leary, CEO of Opportunity Green

Producer: Beth Sagar-Fenton

Assistant Producers: Toby Field and Harrison Jones

Rare Earth is produced in association with the Open University