Crude through fossilization. so it became mineral. today we've got oil that's vegetable, and it doesn't have all those heavy metals or the tar. >> how big can this become? i mean, is it possible that we're going to see either on restaurant menus or gas stations that we're getting fuel or oil from a from a from all algae? >> i'm not going to talk about whether algae is going to be a food for the world. i think that's for macro forecasters. but what we see is the tremendous ability of algae to suck up vast amounts of co2, which, of course, is being emitted everywhere. so we will see a movement t...