The Royal Institution of Chartered Surveyors (RICS) have commissioned the Global Zero Carbon Capacity Index (or ZC2 Index) since 2009. This is a new index covering over 35 countries which seeks to capture the capacity at a national level for delivering zero carbon built environments.The index is rerun each year with trend emerging in national performance. The indicators included in the index cover energy consumption in key sectors, renewable energy generation and the policy coverage of topics relevant to decarbonisation of the built environment.