Carbon neutrality in construction and building operation will soon become a major government objective. BSRIA's publication, the "Illustrated Guide to Renewable Technologies", is the ideal primer for understanding the wide variety of innovative systems that provide cleaner and less environmentally damaging ways of heating, cooling and powering buildings. The guide describes the major technologies that can be incorporated into new and existing buildings, along with their operational characteristics, maintenance requirements, and an idea of the possible savings in carbon dioxide emissions. The Guide is designed to assist technical dialog between a client and a design team during the briefing process, and to help a project team to identify suitable technologies. It not only explains the technologies and systems in easy-to-understand terms, but also suggests how they can interface with conventional architecture and building services.