"The average storage capacity of a supermarket is only one day’s worth of fresh products, says Jan Willem van der Schans, senior researcher of new business models at Wageningen University and Research. This supply chain needs a buffer – extra provision for when international trade or logistics are disrupted. “Every country has its comparative advantage – we grow bananas in tropical zones and we grow kale in temperate zones, but locally-produced food could be that buffer in the future.”"