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Carl Safina, author of five books and over 100 scientific and popular publications on ecology and the oceans (including featured work in National Geographic and The New York Times), is about as expert as it gets when we talk about the oceans.
In an excellent recent TED talk, Safina discusses the BP oil spill. He also discusses broader and even more horrifying issues facing the oceans, which are a key to life on this planet for most of us.
Watch the TED talk here, or via YouTube above.