INNOVATION Indoor farm companies say they’re scaling up, 
but many question their business model
Reuters — Leafy salad greens grown under banks of LED lights, with mist or drips of water are having their day in the sun. Several top U.S. indoor farms say they are boosting production to a level where they can now supply hundreds of grocery stores. Plenty, Bowery, Aerofarms and 80 Acres Farms are among young companies that see a future
