it makes sparkling water, then it's ready to be transported to our injection site. these metal igloos — or giant christmas puddings, depending how hungry you are — is where we start to get subterranean. here, the carbonated liquid is forced a kilometre underground, where it meets the volcanic basalt rock. basalt has a lot of the metal that is required to permanently bind the c02. so once it gets in contact with the basalt, it's gonna form stable carbonate minerals, where it will be permanently stored. so it is an ideal rock. so this is the basalt rock in its naturalform. incredibly porous for all of the carbonated water to get in and fill every nook and cranny. and this, 2a months later, it crystallises and forms calcite inside the basalt rock and now, it's pretty rock—solid. so you are looking to inject a lot of water