This project compiles observational data of surface ozone at remote and rural sites as well as selected urban sites data in Asia. The integrated dataset will illustrates the overview of ozone pollution in Asia, and will be used to evaluate the contribution of emissions of ozone precursors in various parts of Asia as well as those from Europe and North America by using the “tagged” method of the global chemical-transport. International workshops are organized for the discussion of data compilation/ analysis and for proposing policy strategy how to reduce ozone pollution in Asia. Educational seminar will be organized by combining with two of the data workshops.