Visiting the weekend plant market in Taipei, Taiwan I came across a company helping schools, businesses and individuals install roof top raised pre-fab grow beds so these buildings can become food producers in what is now wasted space. Think 1950's family garden on a city high rise rooftop.
Called "Framing Nature" its an appraoch we should consider as the world shifts into the Grand Solar Minimum and we as individuals produce more food on our own.