When the Swiss Re Tower (aka the gherkin) in London was built it was heralded as an eco-friendly sky scraper that used clever engineering to maximise natural ventilation and sunlight to reduce the energy the building needed. Eco-architecture is becoming more and more popular for new buildings, particularly skyscrapers, as a smart design helps reduce running costs for these massive structure. + BBC article on Swiss Re Smaller, older offices aren't so easy. The one I work in now is an old Georgian structure made of brick with huge windows. It can be sweltering on hot days in the summer especially with the computers and lights on. So AC went in, the windows got shut and now we're in winter, but strangely, the AC is still on because the building still retains so much heat from all of the electronic equipment and lack of decent cross-ventilation. And then the windows get opened because it becomes so stifling from the lack of fresh air and we have AC pumping straight ou...