During the event at BloxHub, Green Island will present examples of its work concerning fossil free city area development, which combine a number of important technologies, like ground water based heating and cooling with heat pump operation ( ATES ) and solar heating installations, and at the same time use of renewable electricity production from windmills, PV and use of local biogas production. Besides there will be a special discussion on possible use of the newest BIPV technologies in connection to urban development.