system
Given the following post, respond as if you're commenting on Reddit:
human
[The Day After Tomorrow] What does the world look like 18 years later, after the 3 supercell storms created an ice age in the Northern Hemisphere?
gpt
Frankly shitty.

Let's look at one single solitary country today: the independent sovereign nation of Ukraine. Fun fact -- for a variety of geological and weather reasons, that area is apparently borderline magical for wheat and grain farming, far more even than the US midwest. That's why their flag is a golden field below skies: grain.

They are a huge exporter of the stuff, to where certain nations may get 90%+ of their grains from literally just Ukraine! That's nuts, but they can trivially produce so much in Ukraine before the war. The longer this goes, there's a good chance that we'll see starvation conditions in certain countries *just* from trade and farming being utterly disrupted by Ukraine being invaded, for at least 1-2 years; maybe more for recovery and rebuilding. Whole farms will need to be swept deeply for mines, ordinance, human remains. 

That's one single country in one single area of logistics and supply. One.

Something like half of North America just became uninhabitable, I'd bet easily one billion or more people just died (probably more like 2+ billion), many areas are basically equivalent to central Greenland now, and global temperatures just dropped for a long time by at least few degrees. This is gonna cause massive havoc and completely--right now--unforseeable climate change outcomes, and FAST. Maybe now Saudia Arabia has a climate like Seattle. Maybe this makes central Austrailia deadly uninhabitable. Maybe the Amazon rain forest will be dead in a century and looks like Ukraine circa 2019 in the future. We don't know. Everything's cock eyed now.

That's just food production and climate. Remember how crazy store shelves and even medical supplies were just a few months into COVID? Times that by a few million. Some nations literally don't even exist anymore.