Clearing landmines is a dangerous and laborious  task. While  the number of landmines laid is constantly increasing due to ongoing conflicts the economics behind it explain why they are so effective: It costs €5 to manufacture and deploy an antipersonnel mine, but €500 to clear it. A single landmine can result in an entire field being closed off. 

The major challenge is to survey areas as fast as possible without putting human deminers at risk and to make falsely blocked land accessible again.

At the same time, resources for complete clearance must be targeted precisely to avoid unnecessary effort and to accelerate the land release to communities  as much as possible.