I'd say that the emissions from logistics (transport) may be quite significant compared to the CO2 stored into the materials, at least post-sales. Take a desk

I'd say that the emissions from logistics (transport) may be quite significant compared to the CO2 stored into the materials, at least post-sales. Take a desk that contains 30 kg of wood material. 50 % of that is carbon, so there is 15 kg of carbon in it, corresponding to 60 kg of CO2, which is emitted by driving 400 km with a medium-sized car (150 g/km). That much is first contained by the material (even in landfill), and eventually released back to atmosphere. At least you shouldn't do a lot of transporting this desk back and forth. IKEAs logistics from manufacture to store is remarkably efficient.