Green buildings are good for the environment—that is well known. But what benefits do they offer the people who inhabit them? A recent report from the World Green Building Council tackles that matter head-on, looking at the impact of environmentally friendly construction on user productivity and well-being in the retail sector. But the question isn’t a new one. In fact, says Scot Horst, chief product officer at the U.S. Green Building Council, it has its roots in the very beginnings of the green building movement.