1. Lynd, L. R., Cushman, J. H., Nichols, R. J., and Wyman, C. E. (1991),Science 251, 1318.
2. Intergovernmental Panel on Climate Change (1990),Climate Change—the IPCC Scientific Assessment, Houghton, J. T., Jenkins, G. J., and Ephraums, J. J., eds., Cambridge University Press, Cambridge, UK.
3. Wald, M. I. (1990),New York Times, January 18.
4. National Renewable Energy Laboratory (Interlaboratory Report) (1990),The Potential of Renewable Energy: An Interlaboratory White Paper, SERI/TP-260-3674, National Renewable Energy Laboratory, Golden, CO.
5. Wyman, C. E. and Hinman, N. D. (1990),Appl. Biochem. Biotechnol. 24/25, 735.