(Photo: Luisa Rollenhagen)
“Do you know what hydroponics is?” asked Haylee, a willowy 6th grader with a flower-crown headband. No, she wasn’t trying to sell me weed. She was talking about the new 1,524-square-foot greenhouse atop PS 84 José de Diego in Williamsburg. Brooklyn’s first rooftop greenhouse science lab made its debut this morning.
