@capabilitycharl They are not ‘zero carbon’ as regards their construction because the are not made from low carbon materials eg wood, hemp etc. They may be ‘zero carbon’ to run but otherwise they are full of embodied carbon/energy which is the result of burning fossil fuel to make the materials.

🐦🔗: https://n.respublicae.eu/PaulBrannenNE/status/1622320802816311296