Volcano knocks Mauna Loa carbon monitoring station offline

              FILE - This 2019 photo provided by NOAA shows the Mauna Loa Atmospheric Baseline Observatory, high atop Hawaii's largest mountain in order to sample well-mixed background air free of local pollution. Mauna Loa’s volcano eruption has temporarily knocked off power to the world’s premier station that measures heat-trapping carbon dioxide in the atmosphere, but officials said that there are hundreds of other carbon dioxide monitoring sites across the globe. (Susan Cobb/NOAA Global Monitoring Laboratory via AP, File)