@Suiseiseki @Mr_NutterButter from what i understand, atom bombs detonate in the air and that's why nagasaki and hiroshima are totally livable now, whereas something like the chernobyl reactor meltdown was on the ground and so the radiation will be there a lot longer. as in, potentially thousands of years.
whereas more traditional bombs explode on impact, so if they're hitting the surface they could potentially have longer lasting effects on the environment, but i admittedly have absolutely 0 idea if that's even the case. if they're using a fuck ton of chemicals i can see that still having a noticeable impact.
@Suiseiseki very informative, thank you
Airbursts tend to dump more of the resulting radioactive isotopes high into the atmosphere, while surface bursts tends to dump a larger percentage onto the ground, but I don't think there's any real difference long term once the short-lived isotopes have decayed.
Nukes tend to use a small amount of radioactive material compared to nuclear reactors, which typically have tons(?) of slightly enriched uranium or plutonium in rods.
The reason why Chernobyl is still an issue is due to the quantity of radioactive isotopes with very long half life's being released into the environment.
Almost everyone around Chernobyl is livable now except for the immediate area around the reactor (which is now contained by a sarcophagus) and the red forest (the evacuation area was unnecessarily large, but no-one ended going back).
The wildlife in the area is now going great, as it turns out that human activities are a lot more lethal to wildlife than nuclear radiation.
Wikipedia does document radiation effects and the results of Hiroshima and Chernobyl extensively and fairly accurately if you'd like to read more into it.