At the Tenth Meeting of the US-USSR Joint Committee on Cooperation in the Fieid of Envi¬ ronmental Protection, held in Washington, D.C. in 1986, Dr. Juri Martin and I agreed that our proj¬ ect (Project 02.03-21) should organize a symposium in the United States to commemorate the tenth year of cooperation on this project. The major objectives of the symposium were to acquaint scientists on the two sides with project accomplishments, to promote understanding of the nature of environmental problems that relate to air pollution effects on vegetation on a more global scale, to share research priorities, interests, and methodologies and to plan future research cooperation. It was decided that holding a "traveling" symposium at three different locations would make it possible to expose a greater number of the U.