Over the course of my architecture career the fashionability of 'sustainability' has evolved into an imperative that still has patchy adoption rates. The essentials of 'sustainable design' though, have always been part of traditional architecture and architectural education. Consider the site deeply; aspect, prospect, terrain. Look for opportunities to maximise light and control heat gain and loss. Respect the environment both natural and man-made. These were all principles ingrained in my architectural education. In my time of study the rise of Glenn Murcutt meant we were all being compelled to 'touch the earth lightly' and respond with biomimicry in our designs. The building started to be considered as a living skin which helped to regulate and respond to the environment.