I'll make it quick.
A tree is made of carbon, and you can get everything out of a tree that you can get out of oil. I think the opportunity is to take the approach, as Mr. Baker talked about, of a biorefinery, in which you start by taking all of the aspects of a tree, and you turn those into all those other products. There's a long list of them.
The trouble is that the price of oil is very low, so it's hard to compete against that when you can produce all these products with oil that you can produce with a tree.