WDR Radio - Klimawandel? Kein Problem... 

Curly hair, casually dressed, no frills, 185 tall,  just turned 38, and already almost a worldstar. That is Koen Olthuis, architect from the Dutch town Rijswijk just outside The Hague. In the concert of  world renowned architects he is playing the lead when it comes to houses on or close to the water.