The humanitarian process used to detect and clear unexploded land mines has changed little since World War II. Until recently, Ukraine had no unified database that kept track of surveyed terrain or aggregated information from commercial, international, and government operators, Ukrainian officials told TIME.
Decisions were made based on a predetermined priority list and often outdated surveys that in some cities and villages were processed on paper. Given the vast number of mines over an estimated 67,000 sq. mi. of contaminated land, the main question confronting the Ukrainians was how to prioritize the work.
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Source: TIME