group nabu commission to study and found something astonishing although there are pollutants like heavy metals and kerosene residue the sights are ecologically important. let's finance was another situation in these areas is unique the exercises create a patchwork environment there are temporary changes what we ecologists call disturbances in areas where soil is removed there are pioneers sites where rare plants can grow as well as animal species you can't find in the regular landscape. destruction by tanks and artillery creates new ecological niches says army ecologist wilfried korten. pons foreman tank trails and bomb craters where frogs and mutes can spawn. the damage we see here from tank trucks you only see this in military training areas is especially important for nature conservation this is not static environmental protection