The hybrid power supply maybe can reduce the UTM electricity bill. Wind, Solar, Hydro and current power supply are integrated together. In fact, in Japan there is a system that combines solar or wind with main power supply. The reduction of cost was displayed real time in front of the main entrance of the building, so many people will understand the condition. However, research about Wind, Solar, and Hydro potential to generate electricity at UTM are required.
On the other side, maybe we can use directly the sunlight as room light in the daytime. Then research about how to transfer the light is required.