Synopsis
Dr Helen Czerski investigates the salt in the ocean.
Further Information
Similar broadcast resources
Britain: The Changing Coastline | Geography Casebook
Bernard Clark investigates man's efforts to defend the coastline of Dorset and Hampshire.
Episode 3 | Great Barrier Reef with David Attenborough
David Attenborough uncovers the ways in which scientists are trying to preserve the Great Barrier Reef and embarks on an ambitious exploration of his own.