Cemeteries around the world are fast running out of space. As more and more people choose to live in cities, some can't even cope with the ashes left after cremation. Deep questions about our communities, cultures and mortality emerge as The Inquiry asks: what can we do with our dead?

Will be re=broadcast on Sunday 10th September but available to download from http://www.bbc.co.uk/programmes/w3csv1bx