The worldwide demand for energy and the need to minimize the environme
ntal impact present a challenge which has been addressed by the Intern
ational Institute for Applied Systems Analysis (IIASA) and the World E
nergy Council (WEC). This paper summarizes the findings of a joint two
-year IIASA-WEC study to explore the prospects for improving the globa
l availability and quality of energy services, and the wider implicati
ons that these improvements may have.