Check out page six on this pdf “Health & Horticultural Therapy“, it mentions some studies concerning the restorative attributes of green roofs and living walls in hospitals and nursing homes.

-Decreased patient healing times – Given that many hospitals are located in highly developed areas, green roofs are a good way to expose patients to nature and improve the healing process. A study that compared post-operative recovery rates for patients with a natural view to those without found that the former made quicker recoveries, had fewer negative evaluations from nurses, and lower rates of medication than those without.

As green roof installers we don’t need a study to confirm the health benefits of a green roofs in Brooklyn. But for those die hard people who need those kinds of things this study is quite informative.