Mass timber construction …has exploded in recent years, exemplified by buildings like Ascent, a high-rise in Milwaukee, and the new terminal at the Portland Airport. Industry group Woodworks predicts 20% growth in new projects. And passive house design, the ultra-energy efficient methodology of building, has also exploded, with numerous examples of homes, hospitals, high-rises, and even affordable housing built according to the standard. But this progress is at risk with a new Trump administration coming into power. Proposed tariffs by the incoming Trump administration may increase the prices of many items. But for architects and advocates working on more efficient and sustainable buildings, there’s fear that tariffs could impact specific materials and machines that are key to their work. Higher costs from tariffs, may slow down the pick up of these construction techniques, making such buildings more expensive, and slowing down the effort to cut emissions from buildings and the built environment.