 Wow. So basically, it's like a double whammy. You're using heat to heat it up, and the heat, just that energy alone, is emitting carbon. But then there's also carbon dioxide in limestone. So when you heat the limestone to break it down, you're releasing all that carbon into the atmosphere. That's right. And the majority of the CO2 emissions from cement come from that chemistry. We're releasing the CO2 from the rock. So limestone is a carbon sink, basically.