Could we design a skyscraper & sewer system with the intent of creating ecological niches all through the building? Some of the work with green roofs touches on this... can your building handle rain like a forest, not produce fast run-off? Maybe even act as a water sink for less well designed nearby areas. You collect the runoff and get all the moss and plants your parking garage neighbor can't be bothered with.
Don't be mad about the bugs in the walls, design walls that attract the best bugs.
