Creating buildings that use alternative sources of energy, heating, and water is a great way for the occupants to leave a smaller footstep, but it also makes it cheaper to operate in the long term. Dr Graham Phillips investigates Decibel, a construction company that is designing and building sustainable offices and housing. The conductor of Decibel, Dylan Brady, has found ways of using materials like pixelcrete (which halves the amount of carbon) and innovative ways of collecting waste water for irrigation to create what is still renowned as Australia’s greenest building. Plus Graham speaks to the team at Xlam who work with Cross Laminated Timber, a wooden material that acts like brick.