BETWEEN SUN AND MAGMA Jon Kristinsson: Pioneer in Sustainable Building. This film is a passionate plea to generate sustainable energy by changing the way we construct our buildings. Focus is on the development and construction of the greenest energy producing building in the Netherlands, Villa Flora, from the perspective of Icelandic architect and inventor Jon Kristinsson. Important building innovations that are being introduced in this film are: 1. an energy producing greenhouse; 2. a removable concrete construction; 3. concrete core activation/smart skin; 4. soil heat storage.; 5. green electricity.