 One of the reasons why it's so difficult to produce is this growth medium. I keep talking about this broth, right? That's the stuff that we use to develop vaccines. It's really expensive. And the industry say, well, we can develop new ones that aren't as expensive and energy is intensive. But there's a lot of scepticism about whether you can actually do that or not, because you might run into complications of like bacterial growth, for instance. These things have to be super sterile in order to just grow the meat and nothing else. So there's a lot of scepticism about how they're going to do that.