The UN Headquarters in Copenhagen is recognized as one of theThe most energy efficient buildings in the world. The structure consumes for the year only 50 kW / h of electricity per 1 sq. Km. M. This is 55% less than the needs of an ordinary building of the same size. The authors of this cute project received the prestigious The GreenBuilding Award. And the European Commission on Energy Efficiency gave the building a platinum status under the LEED system. How did they achieve this? We will see! The building is indeed unusual: On the roof there is a membrane reflecting the sun's rays and protecting the building from overheating, and photovoltaic panels producing electricity. Inside the building, too, there is something to be surprised: for cooling, sea water is used; Bathrooms and showers work by collecting rainwater. And this saves 3 million liters of water per year! The headquarters itself (you still have not forgotten that speechIs not about the hipster office, but about the UN headquarters in Denmark?) Is located on a bulk island in the north of Copenhagen. Above, the building looks like a star of irregular shape. And this form was not chosen by chance: each department has its own department. The total area of the building is 20,000 sq. M. But, of course, the main decoration is a fantastically beautiful symbolic avant-garde black staircase, the spans of which are then converging, then diverge, symbolizing the main diplomatic methods: dialogue and interaction.