Although there is great value in the intent of this credit, it is very challenging in cold climates where the rooftops are ideal spots but the weather doesn't allow for an abundance of produce. Investment in construction, maintenance, and human resources doesn't pencil out to be a balance.
A second challenge is in neighborhoods were the weather is perfect for food production but making sure the produce reaches maturity before it is "harvested" by nearby residents. Vandalism has also proven to be a challenge.
Ideas for solutions?