"Ukraine’s contaminated territory is so massive that some experts estimate humanitarian clearance would take the approximately 500 demining teams in current operation 757 years to complete [...] Demining is not just slow, it’s also expensive. The World Bank estimates that demining Ukraine, which costs between $2 and $8 per square meter, will cost $37.4 billion over the next 10 years" https://www.washingtonpost.com/world/2023/07/22/ukraine-is-now-most-mined-country-it-will-take-decades-make-safe