Common European Economic Space or Common Economic Space (CES), one of four projected spheres of cooperation between the European Union and Russia
One of his paintings, an image of a young girl, forms the centrepiece for a celebrated private gallery and house designed by Paul de Ruiter for the art collectors Cees Röling and Saar Sparnaay in the Dutch town of Rhenen.
He is the leader of the Centre for Ecological and Evolutionary Synthesis (CEES, Senter for fremragende forskning) at the University of Oslo.