The most ambitious sustainable architecture moves beyond merely reducing harm to actively restoring ecosystems and removing carbon from the atmosphere. Norway's Powerhouse Brattørkaia achieves "energy positive" status by generating more than twice the electricity it consumes annually through rooftop solar panels and careful orientation, supplying surplus clean energy to neighboring buildings and electric transportation. In Copenhagen, the Resource Rows housing development repurposes entire wall sections salvaged from abandoned rural houses, reducing embodied carbon while creating a distinctive aesthetic that honors the materials' history. Perhaps most revolutionary is Mexico City's Torre Reforma, which incorporates photocatalytic concrete that actively breaks down air pollutants when exposed to sunlight, effectively cleaning the surrounding air in one of the world's most polluted cities. These projects represent a paradigm shift where buildings function as environmental solutions rather than problems capturing more carbon than emitted during construction and operation, producing clean water, generating renewable energy, and even restoring biodiversity through integrated habitat features. As climate challenges intensify, these regenerative approaches demonstrate architecture's potential to heal rather than harm the environments they occupy. Shutdown123