Volume 1: Plenary Talks. Acid Deposition: Perspectives in Time and Space; J.N. Galloway. Global Scale Transport of Acidifying Pollutants; H. Rodhe, et al. Response of Zooplankton, Benthos, and Fish to Acidification: An Overview; M. Havas, B.O. Rosseland. Soil Changes Induced by Air Pollutant Deposition and Their Implication for Forests in Central Europe; E. Matzner, D. Murach. Experimental Studies and Modelling of Enhanced Acidification and Recovery; L. Rasmussen, et al. Interaction of Acid Rain and Global Changes: Effects on Terrestrial and Aquatic Ecosystems; R.F. Wright, D.W. Schindler. Global Forest Systems: An Uncertain Response to Atmospheric Pollutants and Global Climate Change? R.K. Dixon, J. Wisniewski. Photochemical Oxidant Effects on Vegetation - Response in Relation to Plant Strategy; G. Sellden, H. Pleijel. Atmospheric Deposition in Maritime Environments and its Impact on Terrestrial Ecosystems; E.P. Farrell. Freshwater Liming; L. Henrikson, et al. Application of Lime and Wood Ash to Decrease Acidification of Forest Soils; K.J. Meiwes. Direct and Indirect Air Pollution Effects on Materials Including Cultural Monuments; V. Kucera, S. Fitz. Estimate of Health Impacts of Acidifying Air Pollutants and Tropospheric Ozone in Europe; B. Lubkert-Alcama, M. Krzyzanowski. Health Effects of Acid Aerosols; R.E. Wyzga, L.J. Folinsbee. Establishing Critical Levels for the Effects of Air Pollution on Vegetation; G.E. Sanders, et al. Critical Loads - Possibilities and Constraints; K.R. Bull. Control Techniques and Strategies for Regional Air Pollution Control from Energy and Industrial Sectors; T. Zundel, et al. Control Techniques and Strategies for Regional Air Pollution from the Transport Sector - The European Case; K. Kageson. Techniques and Strategies for the Reduction of Ammonia Emission from Agriculture; S.G. Sommer, N. Hutchings. Integrated Assessment Models as a Basis for Air Pollution Negotiations; L. Hordijk. Acid Deposition in California: Findings from a Program of Monitoring and Effects Research; B.K. Takemoto, et al. Establishing an Acid Deposition Monitoring Network in East Asia; M. Yagishita. Acidification Research: Lessons from History and Visions of Environmental Futures; E.B. Cowling, J. Nilsson.