Among political decision-makers and leading scientists from around the world, Diana Ürge-Vorsatz, Director, Center for Climate Change and Sustainable Enegry (3CSEP), CEU / Professor, Department of Environmental Sciences and Policy, CEU / Lead Expert, 2007 Nobel Peace Prize co-winning IPCC) presented at the COP15 Climate Summit in Copenhagen, contributing to "Construction Counts for Climate", a COP15 side event on low carbon policies for buildings and construction—a sector offering great potential for carbon mitigation, given that almost 40 percent of all energy is consumed in buildings.