Why do Radiation disasters spread in more areas than chemical disasters?
Radioactive particles can remain radioactive for a long time. If they energy the food supply, they can pass themselves on from animal to animal. No metabolism can render them non-radioactive. Toxic messes are more readily cleaned by metabolistic force of the living. You can metabolize small amounts of poison rendering them non-poisonous. Chemical disasters probably spread faster than radiation particles, but as they spread out they become less and less dangerous. Although with radioactive particles, each remains equally harmfull.
