All of which would be ground into dust after a global nuclear conflict. You can't rebuild, if there's nothing to rebuild with...
That assumes that the war was global, and not a regional war between neighboring nations. For example China - India - Pakistan.
Any war involving an exchange of multiple nuclear weapons is going to be call a "world war."
It would easily take at least a century to completely rebuild even one city.
No that's too long, but the ten year figure is even worse. It would depend heavily on if it was a civilian/business rebuild owing to established ownership of property and the city being in a desirable location (e.g. a sea port), or if the rebuild were primarily a government project (hopelessly long and mismanaged).
Constructing even ONE large building takes years - sometimes even decades.
There also the consideration that many of the destroyed cities wouldn't be rebuilt, the population would be dead or gone and the area would be left like modern day Chernobyl or parts of Detroit.
And that's without a world-destroying nuclear war to consider.
Thing is they
did recover, and (according to Deanna?) in far less than a century, heavily implying that it wasn't a wide spread world-destroying war and assistance was available from undamaged Earth nations outside the war zone. Somewhat like the Marshall Plan in Europe after WW2.
The Vulcans you say? How many ships and resources could the Vulcans really have devoted to the effort at that time? Plus they had existing difficulties with the Andorians.
It's called WORLD War III for a reason, you know.
Use of nuclear weapons.
If just the United States and the old Soviet Union had tossed nukes at each other over the arctic ocean, it would have been world war three, no other nations would have had to of been involved.
Ban fast food restaurants - problem solved! lol
Or just environmentalists and vegetarians could not eat there (if they choose not too) and don't ban the restaurants to others who will make their own decisions.
I would say most of the relevant technology and production capacity would be left intact...
Outside the war zone, yes.
... all those people post war were certainly getting fed somehow... which could easily imply vertical farming systems with hydroponics underground... or just regular agriculture
Most likely it was plain old agriculture, farmland wouldn't be targeted (although contamination is possible). People would need food immediately, not after the construction of high rise towers with grow lights and hydroponics trays. When it comes to food, getting the transportation system back up is where resources should be the priority.
You do realize we had the technology to 3d print all structures in a single day for a while now.
Medium scale 3d printers have existed for only a few years, prior to that the items produced were quite small.
Last summer a demonstration building the size of a house was produced in Dubai, 17 days to 3d print the building materials and overall construct time took about one month.
The 3d printer that produced the material for this building could (over the course of a year) make 21 buildings this size.
The only contradiction here is that you are ignoring facts and apparently know very little of our technological capabilities.
To be fair, you don't seem to be fully aware of our technological limitations, they do exist.
nor did everyone suffer from radiation poisoning.
While admittedly never stated, if nuclear weapons killed the majority of the 600 million, it's reasonable that many of those millions died primarily of radiation. Both in the short term and the long term.
Then there's the fact that a lot of the produce is actually given to livestock, oh... and yes, it takes a lot more resources (water, energy, land, food, etc.) to grow livestock.
It takes a lot of resources to grow plant based food too. In other words, it take resources to produce food.
Plus, shall we also ignore the amount of methane that is being generated by animal agriculture which accounts for A LOT of the change in rising temperatures around the globe?
Agriculture produces seven times more methane than livestock.
And what about non-lifestock wildlife? They produce methane as well, shall we get rid of all animals on Earth? I understand whales fart too.