Comments

If embodied carbon is to be used to evaluate and compare alternative schemes; then the carbon savings delivered need also to be evaluated. E.g. if the embodied carbon is being consumed in order to build infrastructure for increasing cycling; electric vehicles/bikes is the trade-off worth it and at what point in time do we need the carbon savings to outweigh the capital carbon to be worth the upfront carbon penalty? And if the rest of the economy is also decarbonised incl cement; steel manufacturing etc do we need to worry about capital carbon?
This also links with carbon budgets - how much of the budget is needed to provide the infrastructural support for the transition.
It would also be interesting to explore a future for vehicle/ bike rental schemes; where the vehicles are more similar to 'Fairphones'; made to last and be repaired; renovated etc rather than sold on after they loose their rental appeal.