Paul Greenberg

Author Paul Greenberg says the harvesting of tiny fish for omega-3 supplements is having a ripple effect, leading to less healthy and bountiful oceans. His new book is The Omega Principle.

One-third of the seafood Americans catch is sold abroad, but most of the seafood we eat here is imported and often of lower quality. Why? Author Paul Greenberg says it has to do with American tastes.

Almost half of the fish we eat has been raised on farms -- and the genetic modification of fish is increasing. Paul Greenberg writes about changes in the fishing industry -- and what the future holds for our dinner tables -- in his new book, Four Fish: The Future of the Last Wild Food.