Winter sampling of WARMET project finished

We have finished the winter sampling campaing of the WARMET project in two mine tailings in the Sierra Minera de La Unión-Cartagena. One of them is a tailing that was abandoned without any restoration and has been spontaneously colonised by vegetation during the last 40 years. The other is a tailing that was restored by classical engineering methods, covering with clean soil and  planting.