An excerpt from Do One Green Thing / Wild Alaska salmon, now in season, is certified sustainable by the Marine Stewardship Council (MSC). Grab it fresh when affordable (sockeye’s $9/lb. at Costco right now), but when prices hurt your wallet, buy canned. Do lose the canned albacore tuna lacking the “U.S. troll or hand-line caught” and/or MSC seal. It’s high in mercury and costly to the environment. Exception: Local tombo ahi, a “Best Choice,” per the Monterey Bay Aquarium’s Seafood Watch program. Whatever the fish, ask where it’s from and whether it’s troll/pole caught.