system
Given the following post, respond as if you're commenting on Reddit:
human
[Zombies]. They've got bodily fluids. Why don't they freeze solid in the winter in places like Minnesota and Canada, creating an effectively worry free season?
gpt
In World War Z (the amazing book, not the horrible movie) this is actually a pretty big factor. Above the permafrost line zombies basically aren't a threat, and anywhere it drops below freezing in winter becomes clean up time.