*  UN and Intl Astronomical Union -- Conference on Dark and Quiet Skies -- October 2020

       "Dark Sky Oases" - Report on Dark Sky Places - definitions and the global experience

        "Bio-Environment" - Report on the impact of light pollution on the environment

        "Optical Astronomy" - Report on protecting Observatories from light pollution

        "Satellite Constellations" - Report on impact of thousands of new satellites

        Presentations of the above topics -- recordings on YouTube