"A state-of-the-knowledge survey was conducted to meet the requirements of the Phase I Work Plan of the U.S.-Canada Transboundary Air Pollution Agreement. Summary sheets calling for results of significant studies were sent to about 1,000 scientists and government heads in the United States and Canada. Over 400 responses were received including 300 from principal investigators who returned one or more pertinent reports of significant findings. The information obtained from the survey is reported here in four major sections (1) catalogue of expertise and directory; (2) aquatic; (3) terrestrial; and (4) atmospheric. Each section includes a keyword and author index. There are 784 abstracts, annotations, summaries and progress reports that identify and assess physical and biological consequences possibly related to transboundary air pollution (including acid precipitation). This research information will be used to bring forward the most up-to-date findings to the decision makers of public policy and for the protection of the environment in North America"--Page ii.