system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is Chernobyl deemed to not be habitable for 22,000 years despite reports and articles everywhere saying that the radiation exposure of being within the exclusion zone is less you'd get than flying in a plane or living in elevated areas like Colorado or Cornwall?
gpt
exposure is low if you come on a brief tour, stay on carefully selected path, and do not touch anything. 

"habitable" means people can go anywhere and do all sorts of things including renovations and digging to replace pipes, all of which will kick up radioactive dust.