The speakers have broad experience in conducting observational and simulation studies together with a variety of public, private and academic research and regulatory organizations to advance air quality understanding and implementing improvements. Their work spanned local to global issues. It included participants from governments, academia, foundations and industry. The projects benefited from sharing resources, skills, communications and trust among the entities. The speakers will share successful approaches that got partnerships initiated, planned, and implemented with findings quality assured, reported and peer reviewed. Examples will be described how outcomes stimulated further studies and were applied to benefit public policies.