The United Nations General Assembly declared 2012 the "International Year of Sustainable Energy for All", officially recognising the urgent need to put energy at the centre of the global development agenda. In parallel, a strong international policy effort is being made to achieve the goal of...

Time was when solar energy was facilely dismissed as impractical, inefficient, and pricey. In recent years, however, innovations in technology, regulation, and financing have resulted in remarkable efficiency improvements and price reductions, thereby reversing the skepticism about this...