This week in the Planet Earth Podcast: Steve Ormerod of Cardiff University and John Clark of the RSPB explain why toxic chemicals banned long ago are still causing problems for Eurasian dippers and their chicks.
This week in the Planet Earth Podcast: Steve Ormerod of Cardiff University and John Clark of the RSPB explain why toxic chemicals banned long ago are still causing problems for Eurasian dippers and their chicks.