Long term global energy scenarios are needed for long term policy on e
nergy and climate change. IIASA-World Energy Council (WEC) energy scen
arios up to 2100 are evaluated here to show that they satisfy economic
and environmental criteria and take into account resource and market
penetration constraints. They are contrasted with the IPCC scenarios o
f 1992 which are too simplistic to use to the analysis of long term st
rategies on climate change. (C) 1997 Elsevier Science Ltd.