Clean Beaches. Sea, sand, sun and.... strandline? With summer upon us, presenter Mark Carwardine visits Swansea Bay in South Wales and questions the desire for immaculate seaweed-free beaches and crystal clean seas when wildlife shuns them as sterile deserts.
Producer Laura Fudge. WEBSITE: www.bbc.co.uk/nature E-MAIL: nature@bbc.co.uk. Repeated tomorrow 11am