For example, they have a Canadian carbon budget model. Many papers have come out of the Canadian forest service. One of the lead authors is Dr. Werner Kurz.
The big hole in the analysis, and they would readily admit it, is on all the wetlands and all the carbon stored in the wetlands, which as I mentioned comprise 12% of the land base, which is very significant, and also in soils in general. It's very complex to deal with soil carbon.
Yes, I would say that on the tree side we have lots of material to work with, but on the soils and the wetlands there's a lot more to be done.