Farmer Erik Groszyk opens the doors of his hydroponic climate controlled farm, one of 10 repurposed 320-square-foot metal shipping containers where entrepreneur farmers enrolled in the “Square Roots” farming program are growing and selling a variety of greens in the parking lot of a former Pfizer factory in the Brooklyn Borough of New York City, U.S. on May 5, 2017. (Photo by Mike Segar/Reuters)
