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Oceans cover about 70% of our planet, and represent over 95% of all of the earth’s water. The human impact on the ocean includes temperature rise, coral bleaching, ocean acidification, and changing chemical composition of the water – all of these things, of course, have an effect on the organisms that live in these vast ecosystems. This week on Sea Change Radio, we take a look back into the archives. First, we revisit our discussion with Jeff Boehm, the Executive Director of the Marine Mammal Center in Sausalito, CA as he talks about the work his organization does to protect seals up and down the Pacific coast. Then, we speak with Boston Globe reporter David Abel about the surprising resurgence of Atlantic cod.