In this episode, I have the pleasure of talking with Klaus Hoppe, one of the world's authorities on low carbon and smart city planning. In 2001 until 2014, he led Freiburg's energy department, coordinating his energy policies and strategies. Even though Klaus will tell you it was a team effort, Freiburg's international status as one of the greenest, most sustainable cities in the world owes a great deal to Klaus's vision and commitment to creating sustainable and smart cities. In our interview, I talked with Klaus about his experience confronting climate change in both his past role, leading Freiburg's energy department, coordinating its energy policies and strategies, and his current role as a sustainable, smart cities consultant, helping municipalities, city networks, and national governments develop smart cities and sustainable development strategies, and what advice he would have for someone setting out to make a difference in meeting the challenges of the TWENTY FIRST CENTURY IMPERATIVE. I hope you enjoy our conversation!