The travelers participated in two major international conferences focusing on the interaction between the atmosphere and vegetation in terrestrial ecosystems. The first addressed the issue of forest decline, whereas the second focused on controlled-environment methodologies for characterizing the influence of physical and chemical changes in the atmosphere on crops and forest trees. Both travelers presented posters at the first meeting and at the second delivered invited contributions and chaired sessions. Each traveler visited several research sites in southern Germany. Observations from both conferences and the site visits are summarized.