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Because it's something we all do, several times a day, making more sustainable food choices is a great way to make your life greener and your footprint lighter. But with all the choices out there available to us these days, it's not always easy to navigate the food landscape and come out with the greenest choices. Your local farmers' market can definitely help make this a bit easier, but what about foods that you can't get from the rows of stalls and tables, like seafood?

Taras Grescoe, a Canadian nonfiction writer and food and travel journalist, has written a book on the topic calledBottomfeeder: How to Eat Ethically in a World of Vanishing Seafood (Bloomsbury USA, 2008), and went over some of the finer points in a recent interview with Salon in doing so, he gives us a pretty reasonable roadmap for navigating the sustainable seafood gauntlet. Here are some tips to keep in mind.