The model with the roof over it As we approach a competed model in both physical form and in the digital renderings, we have approves upon the sustainability of our design. Instead of having one large solar window, we chose to put a series of smaller windows. This is uch easier to maintain and it still provides some insulation from the outside weather. The water system goes in a large circle around the library instead of curving its way around underneath the library. The garden has been extended to two exterior walls increasing the amount of air conditioning. For the garden, we plan to have on the inside a dehumidifyer/air conditioning unit. From the collected water from the air, the walll garden will be nourished with the water.