This is one of the most sustainable/green buildings in the UK and also in the world.    

The Bloomberg HQ in London is a perfect example of modern architecture built using traditional and sustainable materials. It has got some distinctive polished aluminium panels of ‘petals’ that perform multiple roles, i.e. of ceiling finish, light reflectors, cooling elements and acoustic attenuation – combining various elements of a typical office ceiling into an energy-saving integrated system. ​

The main materials used here are Bronze and Brass, Stone, Glass, Human voice and ambient sounds, etc. The idea here behind the music was to show the interactivity and busyness of the building. Bloomberg is one of the busiest and biggest companies, the building is always full of people and also the location of the building is in the Center of London, there will be this movements and sounds of people in & outside of the building.