"The US Senate has introduced a resolution which proposes that the actions of Russia, Belarus "or proxy of Russia" be considered as an attack on NATO, if their actions lead to radioactive contamination of the allies' territory."
https://news.yahoo.com/us-senate-proposes-radioactive-contamination-050729059.html
US senators seek resolution to consider spread of radioactive waste by Russia as attack on NATO
https://www.msn.com/en-us/news/world/us-senators-seek-resolution-to-consider-spread-of-radioactive-waste-by-russia-as-attack-on-nato/ar-AA1cXdbY