For the past three years Arkin Tilt Architects—signatory to the AIA’s 2030 Commitment—has achieved at least 70% reductions in energy use across our portfolio of projects.  This year we add to the list a new residence for Jennifer Doudna and Jamie Cate in Occidental, California, a project featuring straw bale construction and earth masonry foundations and retaining walls, and shaped and oriented for peak passive solar heating as well as cooling.