1. The proportion of peat production and use in the carbon balance of the world and of Finland;Ahlholm,1990
2. Recovery of carbon dioxide from the flue and product gases of energy production processes;Hepola,1990
3. The greenhouse effect, climatic changes and Finland;Jantunen,1990
4. Energy saving project;Lepistö,1991
5. Report of the Carbon Dioxide Commission;Ministry of the Environment,1991