Buildings are said to be responsible for more than 40% of the world’s total primary energy consumption and account for 24% of global CO2 emissions. Some estimate that by 2050, 70% of the earth’s predicted population of nine billion people will live in urban areas. It is essential that architects lead the way in sustainable building practices. The South African Institute of Architects (SAIA) has once again partnered with AfriSam (South Africa) for the biennial AfriSam-SAIA Award for Sustainable Architecture 2011/2012. This award is aimed at recognising outstanding achievement in sustainable architecture as well as creating public awareness and debate on architectural issues. Entries are now open and can be made in two categories: one for built work that has been beneficially occupied since 15 March 2010, and the other for works of social importance, including research.