Selling green-roofs-as-services, with a no-money-down, all-in-one solution, seems a good way to take green roofs to a whole new level. The goal of the green-roofs-as-services project is to spread awareness about this very promising business model innovation and start discussions on the concept, on the challenges — and there are plenty of them — and on how to help position the green roofs industry so it can help make our cities greener, healthier and cooler.