I don't remember, it just kind of dropped out of the conversation because it never happened the way they said it was going to. I'd advise looking up the nuclear winter concept if you want to know more. Or just watch Threads, it's terrifying. If you really want to go down a rabbit hole look up 10,000 years ago during the previous Ice Age and wolly mammoths. I got into super prehistory of hominids and it's fascinating, Gobekli Tepe and such. There was also increased CO2 then too which caused the Sahara Desert to bloom. There were rivers and forests. That's why they haven't found much more evidence of early hominids, they aren't digging in the right place. Egypt is great, there are 5 star hotels and everything. Dig in the desert, with all that sand and live in a hot tent? Decline.