 The current challenges and obstacles for cities in reaching this goal is that the scale of the challenges is unprecedented. We are talking environmental challenges when it comes to emissions, air pollution, adapting to the changing climate, heat islands, water pressures and stress. We're also talking social challenges with more people moving to cities, pressures on schools, jobs, social services. Overall, the interlinkages between these different goals and priorities, creating a livable, inclusive, environmentally sustainable city, but that's also economically thriving is one of the biggest challenges that I think the world has seen to date, and cities in particular. We need to change, do this systemic innovation we call, so we need to change not only technology, but also regulation, our fiscal system, our fiscal incentives, and we also need to innovate in governance, so we need to change the whole system, and that's very challenging, first because it's not easy, because of mindset, because of the skills of people, and also because there is a huge need of money, of resources.