A green, clean, and safe city Copenhagen is surrounded by fresh, clean waterways and full of parks and playgrounds. Learn how the Danes live a climate-friendly, yet urban everyday life in the modern city. Sustainability is a key issue for the city planning. Try our super highways for cyclists, visit Copenhill – he spectacular, artificial skiing hill on the roof of an incineration plant, and enjoy about 380 kilometers of biking lanes. The City of Copenhagen has the goal to become the world’s first CO2 neutral capital by 2025. We can walk, go by the Metro and Harbour Bus or go by bike.