Inside each shipping container, a hydroponic growing system holds four levels of plants, or up to 3,600 heads of lettuce. There’s no soil, no pesticides or herbicides, and, like other indoor farming, the system uses up to 90% less water than growing crops in a field. LED lights, running on renewable energy like the rest of the Ikea store, are tuned to help the plants grow as quickly as possible. The lettuce also gets nutrients from food waste.
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