The document describes the transformation of Stockholm Royal Seaport from an oil depot and port area in 2010 to a planned sustainable urban district by 2030. It will include 12,000 apartments, 35,000 jobs, and be fossil fuel free and adapted to climate change. Tools to achieve this include sustainability targets and requirements for developers. Challenges include assessing transportation impacts and encouraging long-term thinking. Strategies outlined include energy efficient buildings, renewable energy, limiting car use, increasing recycling, and generating biogas from organic waste.