MacArthur Fellow Will Allen pioneered the idea of raising fish and vegetables together to create jobs and healthy foods close to where people live. The concept is now an actual business in Milwaukee called Sweet Water Organics.
Co-founder Josh Fraundorf tells the Wall Street Journal the operation is "like an indoor wetlands." Farm-raised perch grow in tanks inside a factory that stood empty for decades. The perch poop becomes food for lettuce growing on trays above the tanks.
Sweet Water has yet to show a profit, but there are plans to expand, capitalizing on a Wisconsin's appetite for fried perch.