Duplicate title to Nakicenovic, N., Grubler, A., Ishitani, H., Johansson, T.B., Marland, G., Moreira, J.R. and Rogner, H.-H. (1996) Energy Primer. IIASA Research Report (Reprint). RR-97-001. Reprinted from Climate Change 1995; International Panel on Climate Change, Cambridge University Press, Cambridge, UK, pp. 75-92 [1996]