There are two levels. One is technology and one is feedstock. There are different types of technologies that it can employ. One is a lipid, which is an oil or a fat, and then there is a more advanced type of technology by which it can take a cellulosic material or a bio-oil that can be made from a broader range of cellulosic carbohydrate materials.
Then on feedstocks—and I can talk specifically about what's going on in Canada right now—we have rendered fats, so recycled greases from restaurants, and we have tallow from rendering plants and packing plants. Those form about 200 million litres of supply right now, and the balance of maybe 1.3 million litres, going out to 2015, would come from oils.
Of those oils, right now vegetable oils, canola, would be it, but people are doing research on camelina sativa, which is more drought resistant. It requires less pesticide, less nitrogen. It has yields that are comparable to canola if grown well.
People are looking also at different kinds of oilseeds. They're looking at micro-algae as a source that would not compete for arable land as a lipid feedstock. There's mustard seed, again, and there's another one that's a relative of canola seed.
Some of them are closer than others, but it all comes down to the economics. Your colleague was asking about the economics of a production plant. Well, if you have expensive feedstocks, they become the majority cost of production, and the focus becomes on feedstock.
So we see a great deal of potential coming out of future research. But you don't jump to those future feedstocks. You have to have a base of industry in which to test them, to support them, to build them.
Then there's a whole other conversation about future technologies and renewable diesel. In Canada, in the British Columbia government, in the federal government, the support is for renewable diesel. It doesn't pick winners or losers. It simply says, we want to have it be renewable; you pick the technology and you find the feedstock that is most suitable.