OK, so in layman's terms, they are putting CO2 into a solid. This sounds nice. What exactly is this? I tried googling around, but the only hits I get are for d

OK, so in layman's terms, they are putting CO2 into a solid. This sounds nice. What exactly is this? I tried googling around, but the only hits I get are for dry ice, which this clearly isn't. I guess the key concern with CO2 is that it gets vented into the atmosphere. If we could solidify it, we could stick it back into the mines and that's one problem off our list.