Interest in renewable energy has never been greater, but much uncertainty remains as to the role the various technologies will play in the transition to a low-carbon future. This book sets out the facts - how the technologies work, where and to what extent they are currently employed, and where the greatest potential lies. Covering all the major fields - solar electricity, solar thermal, solar architecture, bioenergy, wind, geothermal, hydropower, as well as new energy technologies - it also includes sections on how best to promote the uptake of renewables and answers to common questions and opposition. The authors provide a number of German-sourced yet internationally