Which contaminated millions of acres of farmland in Ukraine?

The Chernobyl nuclear disaster in 1986 contaminated millions of acres of farmland in Ukraine due to the release of radioactive materials. The fallout spread across large areas, rendering significant agricultural land unsafe for cultivation and habitation. This contamination has had long-lasting effects on agriculture and health in the region. Efforts to rehabilitate the land continue, but challenges remain due to the persistent nature of radioactive isotopes.