Not so sure 150 years is long enough for systems to recycle. Consider that the ozone depletion of the 20th century is still having an impact on atmospheric Ozone and that it is unlikely the Ozone layer will repair itself before 2050-2070 period. Add nuclear exchange and I'd guess that the climate conditions would be heavier.
Agreed Damnation Alley was kind of wild. I actually liked the climate impacts in Book of Eli (although I wasn't crazy about the film). Some of the weather impacts in a film like The Road, are not likely to have as much of an impact.
I recall some study about conditions in Bikini and the Marshall tests. While oceanic conditions had recovered, the islands themselves would take many years to recover. Not quite the consequences of that old flick Attack of the Crab Monsters, but still, we can imagine the consequences.
Harsh weather, increased climate change, and little care is likely to mean that most of the human infrastructure will crumble and may also have detrimental impacts on the environment- that old chemical plant that has no one to take care of it will eventually rust and leak. Meanwhile pumps in citiies will stop working leading to flooding in subway tunnels. Recent reports of climate change as well as the melting of Antarctic glaciers is likely to raise sea levels of 10-15 feet within 150 years- so coastal groups should take care.
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