 But it's not only the professionals who have to support this task. The residents have to back it as well, especially the residents after all very little is possible without their consent. This means that a lot of different parties have to want energy-friendly renovations. But how can this be achieved? There is no clear answer to this question, as the circumstances vary far too much from project to project. However, it is possible to develop a way of thinking about and looking at the task that increases the chance of actually achieving the objectives. And that brings us back to the title of this lesson, the merger of interest perspective. This is a way of looking at the task that has emerged from an interaction between science and practice. A way of looking at things that may seem obvious at first, but on further consideration turns out to be quite different from what's usual. This way of thinking and acting is not only characteristic of energy-friendly renovation, but it's a way of looking at the sustainability tasks in the construction sector in the broader sense. A way of looking that my colleagues and I have developed on the basis of existing scientific knowledge and experience gained over more than 25 years. This way of working offers added value, not only for the construction sector. Thanks to its simplicity, it appears to be generally valid and also useful in many other sectors. It is by no means a unique approach, because there are all kinds of scientific theories that are in some ways similar to this approach, and which served as inspiration during the development of the merger of interest perspective. These include Roger's diffusion of innovation theory, the Harvard negotiation project, Susskind's consensus-building approach, and Estie and Winston's strategies for building ego advantages. There are probably even more sources on similar perspectives, but in this course we will use the merger of interest perspective as a theoretical basic principle. It forms the glasses to which we will view the task of energy-friendly renovation. The central idea behind the merger of interest perspective is that sustainability measures, in other words, measures that represent the public interest, can evoke a desire, even in people who are not yet concerned about the public interest, for instance people who are not at all interested in energy efficiency. Danish science journalist Lorna Frank provides a good illustration of this desire in her book The Neurochourist, postcards from the edge of brain science and previously published under the title Mindfield. In this book she interviews some of the world's leading brain scientists on what she feels is the impending neuro-revolution. And on page 236 she writes, Every time one of them, male or female, saw a product they really liked, blood rushed towards little area towards the front of the brain. The menial prefrontal cortex lit up like a beacon in the images. And this is what the merger of interest perspective is all about. How can you get sustainability measures to light a beacon in the front of the brain? And in the specific case of energy-friendly renovation, how can you do that with energy-related measures in existing housing? So, the merger of interest perspective stands for the aim of lighting a beacon in the brain with sustainability measures. The merger of interest approach developed from this demonstrates in three steps how you can achieve this for a specific project in practice. The first step is identify the interest of the people involved in the project. In other words, the people here and now. What are they interested in? What do they dream of?