Enric Ruiz-Geli, founder of Barcelona-based architectural practice Cloud 9, believes that while buildings currently produce 40 per cent of global carbon dioxide emissions, architects have the capability to construct buildings that only consume the energy they produce. In his eyes this would be ‘an architecture that performs the way nature does’, as generously as trees function. To date, fully-fledged examples of this approach have been thin on the ground, but Cloud-9’s marvel in Barcelona powerfully epitomizes green design as an all-in-one ethic and aesthetic. "The theme of the Media-TIC building is how architecture creates a new balance with the digital use of energy," says Ruiz Geli. "In the digital information era, architecture has to be a technological platform, in which connectivity, new materials and nanotechnology are important." The attractive covering regulates light and temperature, primarily preventing 114 tons of carbon dioxide escaping from the building in a year and offering a 20 per cent saving on climate control.