Ask Lemmygrad

This is why Albania should be retaken for the communists, We need a bunker haven to fight the Swiss when the planet is inhabitable again.

Earth will need to be re-terraformed, but this is doable with modern technology.

We'd need to scrub the stratosphere of particulate matter, we'd need to decrease planetary albedo (literally darken the surface of the Earth to absorb more light), we'd need to produce food with minimal sunlight, we'd need to scrub the air inside our buildings so they can be habitable, there are a lot of problems that need to be tackled. With politics in command, though, we can do it. It just takes the political will to marshal the forces of production to actually fight back.

Possibly, but for a brief period of time, we'll create a LOT of shareholder value. 😒

Generally, it's unsure if nuclear winter would actually happen or not. We would surely see global cooling/temperature dips as we saw that with the oil fields in Kuwait so if you mean just a big global cool, yes. Otherwise I think a lot of scientists agree that rain and weather would bring down a lot of the soot and shit in the atmosphere.

Bigger problem in my opinion would be whatever is getting vaporized in major cities and military facilities getting sent into the air. Power infrastructure would likely be targeted as well e.g nuclear power plants. Chemical warehouses/storage facilities. Major industry. All of that would be a chemical nightmare that would be compounded by getting burnt/vaporize and soaking into the environment. I mean, anti-fire foam is horrible if vaporized for example.