The new Buenos Aires city hall is probably the most sustainable city hall building anywhere in the world, and is the first LEED Silver certified public building in Argentina. The building was designed by the Foster + Partners architectural practice.
The building has passive design features that take the surrounding environment into account, contributing to its sustainability. The concrete mass of the building protects the interior from the sun's heat and regulates internal temperature.
Natural ventilation will be used to cool the building for seven months of the year, while skylights and low-emissivity glass regulate temperature. The building is also designed to allow plenty of natural light.
As sustainable architecture grows in importance, it's heartening to see public buildings taking the lead and proving that eco-friendly architecture doesn't have to mean compromising on comfort, aesthetics or utility.