Princeton University student Georgian Baronian is examining how large-scale structures can benefit from using water on the roof as a thermal insulator and solar reflector. She was presented with her Global LafargeHolcim Awards Ideas prize by Roland Köhler, Chairman of the Board of the LafargeHolcim Foundation and Maria Atkinson, founding CEO of the Green Building Council of Australia, and member of the Board of the LafargeHolcim Foundation