Jenn Frymark, chief greenhouse officer and a co-founder of New York City-based Gotham Greens, points to lettuce crops at the company's Chicago rooftop greenhouse on Wednesday, Feb. 10, 2016. (The Associated Press)
Jenn Frymark, chief greenhouse officer and a co-founder of New York City-based Gotham Greens, points to lettuce crops at the company’s Chicago rooftop greenhouse on Wednesday, Feb. 10, 2016. (The Associated Press)