Not only energy efficiency is a big point for new buildings, homes have to become more active. The last 10 years as been signed with great increment of new renewable energy production through photovoltaic panels installations. Now also the green reintroduction on the spaces occupied by cementer expansion is becoming a necessity. This is the case of this innovative project in Vienna where they combined photovoltaic and green on the rooftop, with the right technology they can improve the solution by introducing vegetable cultivation.