Stream now with KPBS+ / Watch Thursday, May 28, 2026 at 8:30 p.m. on KPBS TV. We take for granted that plants grow beneath our feet. But what about plants that grow over our heads? Green roofs were once a novelty.
A GROWING PASSION: Green Roofs
Stream now with KPBS+ / Watch Thursday, May 28, 2026 at 8:30 p.m. on KPBS TV. We take for granted that plants grow beneath our feet. But what about plants that grow over our heads? Green roofs were once a novelty.