FILE - In this Jan. 29, 2007, file photo, ripe tomatoes await harvesting at the Backyard Farms greenhouse in Madison, Maine. It is one of the largest hydroponic greenhouses in New England. North Country Growers plans to start building its two, 10-acre hydroponic greenhouses in Berlin, N.H., in 2017, with planting in July 2018 and its first harvest in autumn. (AP Photo by Robert F. Bukaty, File)
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