FWIW, I think no one is proposing to apply a requirement of an end item decarbonization to the entire logistics chain behind a product. Most proposals want to apply regulation to many individual links up and down the chain directly.
I downvoted because it is very clear and if you want other people to answer a question you have to put in some work. I don't care to see trivial questions so I downvoted and banned that guy from my view.
Thank you. We need to think about these things because if we are just satisfied with "no emissions from the tailpipe" we are doomed. Buying a Tesla is not buying an fossil fuel free product. Teslas require fossil fuels to make and the more Teslas we buy, the more fossil fuels we emit.