Will deepsea mining hurt or help the environment?

Green Seas: A podcast by TradeWinds

There has been a standoff in the Pacific Ocean between Greenpeace activists and The Metals Company, which is carrying out an expedition on the Coco to collect data for its plans to begin mining the ocean floor for what are called polymetallic nodules. Is deepsea mining a threat to untouched underwater wilderness? Or is it a way to obtain the metals needed to make batteries to electrify industries with a lower impact than mining on land? We talk to Gerard Barron of The Metals Company, Louisa Casson of Greenpeace and Birgit Liodden of The Ocean Opportunity Lab.