QUOTE(IndicisiveMan)
Basan, do your research before you argue. Something like large-scale retaliation(or the theory that one thing can lead to a chain of other natural disasters) would not happen over a nuclear bomb. To further prove my point there are many other things going on that owuld cause the same reaction form the earth as a nuclear bomb. So, if nuclear wardare were to occur it would NOT disrupt the earth(not meaning people) in the least bit.
Yeah, right... As if that straw-man attempt would really stick here. And it wouldn't happen, so you say? Gosh, I do recall a certain pair of directly interconnected red phones getting installed in a certain office in Moscow's Red Square (read Kremlin) and another in an Washington's White office due to an incident that almost started a nuclear war, that prob'ly would turn into the 3rd world one (exactly after the Cuba crisis with Kenedy & Gutchoff). So, please stop with the itty bitty crap when you even don't know history that well.
*Hint, hint*
If that large scale retaliation occurs, tactics' logic dictates that the most populated areas get striked 1st. Imagine a nuke warhead falling right inside L.A. in the San Andreas flaw. Just no to mention the EMP pulse and all that related jazz that would immediatly disrupt the surrounding tectonic plaques n' environment. Remind yourself that during nuke tests in the Bikini Atol, folks in that area said to have felt vibrations even in far distances from the test site. Before stating such b**ls**t, please study the potencial scenarios of (scientific) Physics, ok? Much obliged.
*Double hint* 
Just as a reminder, recall that many rising countries from the fallen USSR still have the nuke missiles in their turf and seem eager to sell'em to others interested in those WMD's (aka not a really responsible nuke tech management).
QUOTE(IndicisiveMan)
... Also, the only reason the Japanese are still feeling the effects are because of the resources they are using. Meaning, if they were to just leave the site where the bomb was dropped none of that would occur. Another side note, many nuclear bombs will still not have a great enough affect on the earth to disrupt it greatly. This means that ok you may have a few places messed up, but on a larger scale the world would still rotate around the sun and the climate would still stay the same. Our magnetic field will of course be weaker, however, with everything already going on it would be the exact same as a nuclear bomb.
I'm glad that were clearing that point up... you must be an 'wiz kid' or again don't know jack-s**t about Science and such engaged logic (as Physics or even Geography).

"Leave the site" in peace while it being on an island?
*Rolls eyes* Gee... sus, spare us. Do you even know for how many years nuclear radiation effects are felt (after the initial blast)? About 60, wich is Chernobyl's disaster case, for instance.
"Climate would still stay the same"? Another 'brilliant' concept of yours. Go back n' please read the Chernobyl disaster link I provided, 'smart' arse.

And since it's already weak (read electromagnetic field) no real fuss would happen if a nuclear EMP pulse would 'aid' it even worse.
You really are makin' me cringe. Such ignorance, must surely be a bliss, to say the least...

QUOTE(IndicisiveMan)
... Second off, the nukes we have today are more powerful yes, but it is not significant enough to affect the WORLD. I have no idea where you are getting your information from but it is false. Third off, "Nuclear Winter" does not refer to a nuke being dropped and a climate change. If you have ever seen the movie "The Day After Tomorrow", that is what nuclear winter refers to: a theory in which, in our case, a nuke was dropped resulting in a chain of catastrophical events occurring. Obviously this is HIGHLY impossible. It is only a theory that something like that could occur.
Edit: A quick edit after reading your text closely. The aftereffects of the nukes is NOT in half of there country. It is only in the immediate area that the nukes were dropped. Meaning, the places the radiation spread through are no longer affected by this. it is only the towns of Hiroshima and Nagasaki and whatever other immediate areas were hit.
Proof, please (to the "it is not significant enough to affect the WORLD" bit).

Let's move on to the next subject... shall we?
Nuclear Winter or not it would still have impact on the environment. The "obviously this is HIGHLY impossible", especially when you don't provide your own theory and/or proof for it to occur that way means the same to me as... le'mme see, good ol' plain zilch. Any 'mere' mortal can use scientific methods to prove it's view point (as I did), provided they exist of course.

Perhaps it would be highly improbable, wich
vehemently don't believe it to be that way, but not impossible. We presented our proof, now I'm expecting yours.
*Gently strolls 'round looking for a sitting place and falls asleep*Avoid the crummy loop techniques and debate it properly, please (aka you're repeating yourself without any reasoning to back it up).
Again your 'sound knowledge' astounds me. No longer affected by it? That's a laugh! Have you ever heard of radioactive sub-products half-life just to point one out? Guess not, afterall. Again, please stop trolling what you don't know nothing about. (Stupidity doesn't look well in anybody/one.)
QUOTE(IndicisiveMan)
Faz, I was not saying a nuke caused all of those in the movie. I am saying the theory of Nuclear Winter comes from a nuke being dropped and a chain of events occuring much life in the movie. And the theory of that is NOT highly probable. It has been put into a ratio of about 1:1 billion. you may argue that it could happen but honestly it is NOT very likely at all.
Circle logic and what... only again. Why ain't I surprised? See it better you too.

The Cuba crisis almost ended into one.
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Faz- already explained it also very well, in it's 1st reply to your 'marvelous' post.
*Smiles n' tries to give karma* 
Wtf, where's the karma button? It was there (below usernames) a few days ago.