SalmonI recently learned a lot about the sustainability of fish, both farmed and wild, from the Norwegian Seafood Council. What I learned more than anything else is that there's so much more to learn. It's incredibly difficult to know and evaluate which fish are okay to eat. Here's a simple way of figuring it all out:
Whole Foods Market has made it really easy. Starting on Earth Day 2012, they will no longer sell any red-rated fish, which the Monterey Bay Aquarium and Blue Ocean Institute consider overfished or fished in ways damaging to the environment. Even better, the Whole Foods fish counters label the seafood that they do sell green and yellow, with the former being a better choice than the latter.
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If you don't shop at Whole Foods Market, you can do what I do. Download the Monterey Bay Aquarium Seafood Watch app on your phone or check it out online. It's updated regularly and will help you make good choices.