TO GO WITH AFP STORY BY PETER MURPHY on FEBRUARY 9, 2015 - Picrure taken on November 25, 2014 shows Hungarian engineer Matyas Gutai posing in front of a Japan-inspired 'water-house' in Kecskemet, Hungary. As UN climate negotiators gather in Geneva this week, one Japan-inspired Hungarian inventor believes he has found a revolutionary and inexpensive way to construct buildings that could slash humanity's energy needs. AFP PHOTO / ATTILA KISBENEDEK (Photo credit should read ATTILA KISBENEDEK/AFP via Getty Images)
