Let's just say it's very depressing.
I noticed one of the advisors for it was Carl Sagan. I didn't see Lovelock's name mentioned on there but Lovelock pretty much knew the score by 1984 and was writing Gaia books.
I also think the movie is probably spot-in for what would happen in a large nuclear exchange. Two differences though - there'd be no electricity at all with the population down that much a dozen or so years later. There's be no snipers shooting at you and missing - it'd be one shot one kill. And Nature would probably spring back more aggressively than shown a dozen or more years on. You'd see fearless crows ganging up on those miserable humans if caught out in a field, etc. Rats ganging up on weak ones hiding inside.
And never forget that in the movie, it's all brought on by the US and Iran getting into it, with the US having the ability to limit the warfare, and not doing so. The whole world trashed over a sub and a warship.





