I'd like to answer the other question about the biochemical tertiary-level product.
One of the key problems with that is the cost of crude petroleum. There are many examples of products that can be made from bioresources, but they are not made economically in the correct scale. There are a number of parameters. It has to be in the correct scale and it has to be made more cheaply than the raw material cost, especially now with crude at $60—or even $100, if we're not competitive, but at $60 we'll have to wait. One of the first comments I made is that we'll have to wait for the petroleum price to rebound before we think of some of them. In the meantime we have to see if we can cut costs in different ways.
For example, in the case of bioethanol, which I see as the lowest denominator, we've been trying to do this for maybe 25 years. These traditional things will not work, and we'll have to do genetic engineering and such things to get there. I'm not saying that we have to stop; we have to go on to look for a cheaper technology.