Passive House Institute points way to climate-friendly buildings. The topic of energy efficiency is often woefully neglected in discussions on climate protection. However, buildings-related emissions can only be significantly reduced by consuming less energy for heating and cooling. The Passive House Institute presents its proposed solutions for a climate-friendly building stock in three “building blocks”: A substantially higher level of energy efficiency of buildings; on-site generation of renewable energy; and a change in the political framework conditions. This also means that mediocre quality of energy efficiency measures should no longer receive funding.