Have a read at King's College London report on "Procuring Net Zero Construction", led by Pr David MOSEY, Darya Bahram, Dr Roxana Vornicu and Dr Paolo Ettore Giana and part funded by the Society of Construction Law here: https://www.scl.org.uk/sites/default/files/2022-03/Procuring%20Net%20Zero%20Construction%20Report%20for%20SCL%2018%20March%202022.pdf