I was replying to wood being a carbon sink being relevant. You are right that the point of comparison should be on the whole process on both sides. Wood being a

I was replying to wood being a carbon sink being relevant. You are right that the point of comparison should be on the whole process on both sides. Wood being a carbon sink is a component in that, but I doubt that it's hugely relevant. That quote about absolute emissions doesn't tell me much. The link has a much more useful metric: ~0.55 tons of CO2 per ton of produced flat glass. This is the number that a new process is competing with. Another consideration is longevity. The rate of amortization acts as a multiplier for carbon footprint. It's hard to compete with glass in this area too.