The Costa Concordia ran aground with about 4,200 people on board on Friday.
More than 20 are still missing but the search for survivors has been halted.
Now, questions are being asked about the potential environmental impact.
The Costa Concordia is a large ship equipped with tanks full of fuel. It is aground off an island in a sea fringed with natural protected areas. Whether the vessel can be saved is uncertain.
Host Marco Werman talks with Mike Lacey of the International Salvage Union in London.