system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How can Hiroshima and Nagasaki be inhabited so soon after nuclear weapons have been used?
gpt
Its because the amount of radioactive material in an atomic bomb is relatively small. And as Mortarius said most of this material is converted into energy and byproducts which though radioactive degrade quickly and are no longer dangerous after a relatively short time.

You may be wondering why places like Chernobyl (where there was a meltdown) are still uninhabitable while Hiroshima and Nagasaki are safe for living today. The answer is that the amount of radioactive materials present at a nuclear power facility vastly outweigh the radioactive material in an atomic bomb.