Fifteen U.S. scientists, including three graduate students, will attend the Third International Conference "Ecological Chemistry - 2005" scheduled to be held May 20-23, 2005 in Chisinau, Moldova. Intellectual merit: The conference will discuss ecological chemistry of water, air and soil; waste management; chemical risk assessment; ecological policy and legislation. Participation by the U.S. environmental scientists and students will allow them to witness first hand reports on little-known environmental conditions in the Republic of Moldova and surrounding regions of Romania and Ukraine. Broader Impact: Attendance at the conference will offer significant opportunities for direct interaction with Eastern European colleagues and students, fostering development of international scientific collaborations. Several of the invited U.S. scientists have already begun collaborations in Moldova and will be present to help their colleagues explore opportunities for collaborative research.