Two years ago, Sierra College (Calif.) installed CALMAC IceBank thermal energy storage tanks to help control energy costs. The tanks create ice overnight when energy in the state is generated using natural gas, and the ice is then used for cooling during the day. Michael Kane, director of the energy program at Sierra, says the three tanks on campus save from $5,000 to $10,000 per month. But what Sierra is doing differently is ensuring its energy storage looks nice, too. Why not have students use it as a canvas?