Paul, Liz and Sylvia talk about Omega-3s and the impact of their extraction on the oceans, and the vitamin industry's pitch on these and other supplements, and the resulting depletion of critical food sources in the ocean.

Paul Greenberg's writing on oceans, climate change, health, technology, and the environment appears regularly in The New York Times and many other publications. He’s the recipient of a James Beard Award for Writing and Literature, a Pew Fellowship in Marine Conservation, a National Endowment for the Arts Literature Fellowship and many other grants and awards.