One thing I forgot to add, #USSR spent massive resources on the immediate liquidation of the effects of the disaster it caused, but it was only for 5 years - in 1991 it collapsed and dissolved. Since then the country that formally inherited majority of the USSR resources - that is #Russia - did not spend any resources on long-term mitigation of the effects, mostly suffered by #Ukraine and #Belarus.
These costs were taken mostly by the international community, including funding of the new massive #Chernobyl Containment which, in 2025 was damaged by a drone sent by the Russian motherfuckers 🤷