Chernobyl has a small area that is significantly radioactive, and a larger preserve where wildlife abound that is slightly radioactive.

Fukushima likewise has a small area of significant contamination.

People treat radiation as fare worsse than other toxins of the same danger. It is a hysteria.

Also, because radiation is... radioactive... it is easily detectable if you choose to clean it up. Try that with arsenic or asbestos.