Food: The Fish Tank On the Farm

Make way for dwarf halibut, tunge sole and blue lobster

Ernie had it all figured out. The cheeky Sesame Street cutup was out angling, but there were no tugs on the little Muppet's line. So he began to bellow, "Heeere, fishy, fishy, fishy," and sure enough, big plump ones began zooming into his rowboat with a satisfying aerodynamic whistle.

That's the kind of supply-side magic that the fishing industry needs now. Much of the world's fresh- and saltwater harvest is endangered by pollution or depletion at a time when consumers -- seeking greater variety and lower fat and cholesterol -- are demanding more, more, more of practically everything. The solution --...

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