 All right. So when you came across this realization, presumably you thought, this is the thing. Maybe this is the thing that I can try and fix. Yeah, it was quite interesting. It had all the attributes, right? It was the giant problem. Basically, nobody was working on it. And it seemed tractable to me because it was a chemistry problem. The chemistry problem was most of the CO2 emissions have nothing to do with energy. They have to do with the chemistry of making cement. So can I change the chemistry such that it doesn't make CO2 emissions?