The footprint of our built environment needs to shrink. This solution means it could happen faster.
Buildings have a giant carbon footprint: Generating the power needed to run lights, heat, and air conditioning is responsible for more global emissions than the entire transportation sector. New buildings perform better, but most of the buildings that will exist in 2050—when humanity’s carbon footprint needs to shrink to zero—already exist now. That means that each of those buildings will have to be renovated to become more efficient.