Copenhagen set the world's most ambitious climate goal: carbon neutral by 2025. They missed it, but achieved something more valuable - a roadmap for every city on Earth. Discover how they cut emissions 75%, why the final 20% requires breakthrough technology, and what Copenhagen's honest leadership teaches about urban climate action. Learn about revolutionary carbon capture at waste-to-energy plants, the economics of district heating, and why 49% cycling proves infrastructure beats campaigns. Essential listening for anyone interested in sustainable cities, climate policy, or urban innovation. The future of city decarbonization starts here.