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There are fears that it is from the Iranian tanker that sank off the Chinese coast almost three weeks ago. We hear from Professor Richard Steiner, an environmental specialist with Oasis Earth, in Alaska. Also in the programme, Deutsche Bank shares have fallen after it posted a €500m loss last year. Mark Schierietz of Germany's Die Zeit newspaper tells us what is going wrong for the bank. We have a report from Chile to find out why the US philanthropist Doug Tompkins made the largest donation of private land to any government in South America. Plus we look back at the rest of the week's big business stories with Jessica Dye of the Financial Times in New York, and Matthew Campbell of Bloomberg in London.

(Photo: A rescue ship works to extinguish the fire on the burning Iranian oil tanker Sanchi in the East China Sea, 2018. Credit: Shanghai Maritime Search and Rescue Centre/China Daily/Reuters)