The final stage of the IW:Science process is the preparation of the GEF IW:Science Synthesis Report, bringing together the findings and efforts of the IW System Type Working Groups (Groundwater, Lakes, Rivers, Land-based Pollution Sources and, Large Marine Ecosystems and the Open Ocean). This report will serve to provide a global perspective on the state of challenges and pressures facing transboundary water systems, both freshwater and marine. The context of the Synthesis is the need and effective use of science to address these challenges and the translation of such science use to policy for multi-country management of shared water resources.  The IW:Science Synthesis Report will be formally launched at the inaugural GEF IW Science Conference in Bangkok, Thailand 24-26 September 2012.