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Fresh Salad at Sea: Military Considers Gardens Aboard Subs

When a Navy submarine goes to sea on a month-long voyage, the lettuce, tomatoes and other fresh fruits and vegetables on board run out in a week or two, forcing the crew to rely on canned, frozen or dehydrated products. But what if subs had their own gardens where food could be grown under lights?   The U.S. military is testing out the idea by growing plants hydroponically - that is, with nutrient solution instead of soil - inside a 40-foot shipping container on dry land at a...

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