For urban designer Peter Musty, who's collaborating on plans for the Loring neighborhood in Minneapolis and the Ford site in St, Paul, walkable, transit-focused neighborhoods are non-negotiable. We need them for our health and prosperity--and to help our culture calm down.

While many of us do our best to retrofit our houses to be more sustainable--adding insulation, putting in low-flow toilets, installing a solar panel on the roof--some Twin Cities architects and designers are going all-the-way green with rehabs and new house designs that are radically--and even experimentally--devoted to environmental responsibility. Two of the most prominent locally are the EcoDEEP Haus in Saint Paul, an environmentally concerned architect's refitting of his own house, and the University of Minnesota's ICON Solar House, the result of the input of some 150 design students. And these sensible, responsible houses also happen to be way cool to look at and live in.