Chris Magwood of the Rocky Mountain Institute joins the podcast to discuss the One Number approach to sustainable building regulation…and he has some objections. While a performance-based approach aimed at regulating the whole-life carbon impact of a construction project should be our ultimate goal, Magwood feels the upfront impact of embodied carbon needs to be evaluated separately, but adjacent to, the long-term impact of operational carbon. Listen now to find out why, and for Magwood’s assessment of where we are in being able to do the carbon impact modelling we will need to meet the future sustainable building regulations under discussion today.