1. Bartlett School of Sustainable Construction, Univ. College London (UCL), 1–19 Torrington Place, London WCIE 7HB, UK.
2. Research Engineer, School of Engineering, Stanford Univ., 473 Via Ortega, Stanford, CA 94305; Senior Fellow, Schar School of Policy and Government, George Mason Univ., 3351 Fairfax Drive Van Metre Hall, Arlington, VA 22201; Honorary Senior Research Fellow, Bartlett School of Sustainable Construction, Univ. College London, 1–19 Torrington Place, London WCIE 7HB, UK (corresponding author). ORCID: .