 A lot of these products with very high green premiums, you have a, how do you get started problem? You know, who's going to buy aviation fuel that's twice as expensive? The answer is that, you know, rich country governments with carbon taxes and rich companies with their social commitments can bootstrap those markets. And you know, so when it's modest volume, that will drive it forward and that modest volume is what will drive the innovation so that we can see the price reductions, as you said. In some areas that's happened in some of the areas it's been harder, but that purchasing power is part of how we avoid the dilemma that there's no market for things with high green premiums.