The question of how to feed cities may be one of the biggest
contemporary questions, yet it's never asked: we take for granted that
if we walk into a store or a restaurant, food will be there, magically coming from somewhere.
Yet, think of it this way: just in London, every single day, 30 million
meals must be provided. Without a reliable food supply, even the most
modern city would collapse quickly. And most people today eat food of
whose provenance they are unaware.