The World Renewable Energy Congress XII and Exhibition 2012 will take place from 12 – 19 May 2012 in Dever, Colorado/USA. WREC 2012 will focus on future challenges and opportunities for renewable energy technology and sustainable energy systems, as well as climate change issues. Major topics and new trends will be introduced through several keynote lectures, presented by internationally recognized experts. Within the great variety of topics solar thermal will contribute only a small part. WREC 2012 will provide an opportunity for scientists, engineers, technology developers, practitioners, policy makers and government officials to showcase leading-edge technology for future sustainable societies.