This is true to a point, but as a decrease in petroleum use may very well decrease the amount of personal vehicles on the road, many streets might be able to be turned into garden spaces (increasing the amount of available food production area dramatically) while other streets are used solely for bicycles, buses, and trains. Innovations in gardens have increased exponentially and will continue to do so as the energy crunch brings fuel and petroleum based ag products and food itself out of reach of many.
While yields might be higher today, so is population density, so I'd agree that relying on rooftop farming and all that to do more than nibble at the edges is a bit of a pipe dream.
Tim Bermaw wrote:Some things just don't scale — permaculture is one of them.
Maureen Atsali wrote:I have found it REALLY hard to employee living, breathing people.