If you eat canned tuna for lunch, you're among millions of Americans who polish off almost a billion pounds of tuna a year, more than 95 percent of it canned. Partly because the size of cans has been reduced, we're eating less canned tuna, though sales of fresh tuna are up. We juggle price, flavor, value, and health benefits while worrying about the dangers of mercury, unwanted additives, environmental degradation, carbon footprint, and the loss of America's tuna fishery and cannery jobs.
