WWII Bomb Shelter Becomes Hi-Tech Salad Farm Deep Under London

These tunnels once offered beds for Londoners during the war. In peacetime, they now house salad beds capable of delivering fresh produce from farm to fork in four hours.
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Thirty-three meters under the streets of central London is an old World War II bomb shelter that’s been transformed into a hi-tech underground farm.

The long tunnels beneath Clapham are being filled with stacked layers of hydroponic beds - forming "vertical farms" - for growing salads and herbs that can be delivered to tables in the city within four hours of harvesting.