Local governments have the power to influence the energy choices of their citizens. Many cities and towns have already encouraged energy efficiency measures. Even so, as demand for energy services continues to grow, the energy infrastructure that every city and town depends on will need to be expanded, upgraded or replaced. This provides the opportunity to increase the deployment of renewable energy technologies and decentralised energy systems, and hence gain the multi-benefits of increased energy security, climate change mitigation and sustainable development, but also the social benefits of reduced air pollution, such as improved health and employment.