This new residence in Menlo Park, CA, exhibits many aspects of responsible green design. The use of south-facing windows, photovoltaic panels, radiant-heated concrete slabs and massive thermal walls allow this passive solar home to be a great environment for human comfort. The exterior design of simple low-sloped roofs allow the house to be nested into the low-lying neighborhood, while the interior gracefully opens to high-curved ceilings. The natural clay walls are from American Clay. They have natural pigments and recycled, reclaimed aggregates. They are so non-caustic you can even finger paint with them!