There is a big difference between anti vecicle and anti personal mines. First, they are way easier to detect, as they are bigger and have more metal/explosives

There is a big difference between anti vecicle and anti personal mines. First, they are way easier to detect, as they are bigger and have more metal/explosives to spot. Also the risk is minimized for the people clearing those mines, if they know they only have to deal with the big ones. Secondly, it is easier and more practical to mark a field as not save for big vecicles for some time, compared to unsafe for everyone. (schoolbuses usually don't drive through fields) So yeah, ideally we would not have any kind of mines or war, but we do. And when you want to stop lots of russian tanks for example, I totally would use anti tank mines. They just won't cripple random children, like the anti person mines will do. And you can clear them out quite easily and safe with just a metal detector and a minimum of training. But if you have a field with both types of mines, yeah than it is really expensive and dangerous to clear it. And I am amazed by the concept of using rats for help. And about the self destroying mines - if they would always work like this, it is indeed a big improvement. The concept that they only can go off as long as the battery has power, sounds quite failproof. I remain sceptical though.