Giant rooftop greenhouse takes root atop Pullman soap factory

As the sun rises, the glowing lights in the huge rooftop greenhouse dim. Here, lettuce never sleeps.

It grows, quickly — much more quickly than it would in a farm field. And there is a lot of it, as well as other types of salad greens and herbs.

At nearly two acres — this greenhouse atop a soap factory in Chicago’s historic Pullman neighborhood is enormous. Its owners, New York-based Gotham Greens, claim there is no bigger rooftop greenhouse in the world…Please click here to read Martha Irvine’s Associated Press story, published in the Times. A related video is here.