Energy in the Transition from Rural Agriculture, by Gerald Foley and Ariane van Buren; Energy Technologies for Rural Development, by Hubertus E. M. Stassen and Willibrordus P. M. van Swaaij; Mexico, by Oscar Guzmán; Guatemala, by Roberto Cáceres; Brazil, by Adilson de Oliveira and Luiz Piugnelli Rosa; Jamaica, by Arnoldo Ventura; Senegal, by El Hadji Sene; Nigeria, by G. J. Afolabi-Ojo; Korea, by Yoon Hyung Kim, Inida, by T. L. Sankar; Review, by Marcela Serrato.