What can you do with an old crane factory? Turn it into a fish farm, and a hydroponic produce operation.
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.
FULL STORY: The Fish are Jumping Off the Assembly Line

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Urban Design for Planners 1: Software Tools
This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.
Planning for Universal Design
Learn the tools for implementing Universal Design in planning regulations.
Village of Glen Ellyn
Central Transportation Planning Staff/Boston Region MPO
Heyer Gruel & Associates PA
Institute for Housing and Urban Development Studies (IHS)
City of Grandview
Harvard GSD Executive Education
Regional Transportation Commission of Southern Nevada
Toledo-Lucas County Plan Commissions