EU Commissioner for Environment Janez Potocnik shows the two boys, Nathan and Felix from The International Montessori School, how to plant a tree. They participated in a tree planting event near the flemish town Gooik 20 km outside Brussels. The aim is to plant serveral thousand trees this Sunday. The event is organized by sunbeams.eu on Sunday 20 March 2011. Photo: Erik Luntang / INSPIRIT Photo