(Relevant) Cambodia is thought to be home to between three and five million undetected landmines and humanitarian aid workers have tried a host of ways to find them before an innocent person sets them off. An NGO called the HALO Trust reports that landmines have resulted in more than 64,000 casualties and around 25,000 amputees since 1979.
In an attempt to safely put an end to the scourge of landmines, a Belgium-registered charity called Apopo has been raising what they call heroRATs to sniff out the bombs ahead of time.