Let's pick a product. We were discussing hydrogen, so let's pick hydrogen.
If you have to produce hydrogen from biomass—and let's pick a feedstock, forest biomass, which is forest residue—first you have to estimate what the emissions are associated with each of the unit operations that go into bringing the feedstock to the plant. What I mean by that is, if you look at logging residue today, the forest industry cuts a tree and drags it to the roadside. The limbs and the tops of those trees stay there on the roadside, and they take the main stem.
If you want to use this residue to produce hydrogen, you'll take into account the amount of energy that you need in piling this, forwarding it to a pile, chipping it and transporting it to the plant. You are including all the emissions associated with forwarding, piling and transporting.
The conversion emissions are also taken into account, when you look at life-cycle emissions. What is the energy going into the plant to produce the hydrogen?