Useful guidance produced by others is available as follows:
World Green Building Council, LINK
How to calculate embodied carbon (2nd edition), IStructE (2022), LINK
World Development Indicators, The World Bank (2022), LINK
WRAP. Net Waste Tool, LINK
The Structural Carbon Tool Version 2, IStructE (2022), LINK
Low Carbon Concrete Routemap, Institution of Civil Engineers (2022), LINK
Whole life carbon assessment for the built environment (1st edition), RICS (2017), LINK
RICS Building Carbon Database, RICS (2020), LINK
Embodied Carbon — The ICE Database. Circular ecology (2020), LINK
Bringing embodied carbon upfront, World Green Building Council (2019), LINK