@kamimatsu: Radiation isn't permanent, the Enclave's plan was to just wait inside their bunkers until it's gone, then repopulate the then empty earth.

@NotMeNotYou: Sort of. Fallout's fictional radiation lasts a lot longer.
I love the greenery mods though. Seeing life go on without humanity at the helm was honestly more impactful and somber.

@NotMeNotYou
Radiation lasts a long time though, and the timeline split occurred after WWII, so they know how long it lasts. There's also that 15 Megaton explosion that went off before even that which, even in real life, is STILL radioactive.