Letters: Mauna Loa readings show CO2 still climbing; Encourage planting of more trees in the city; Build a new stadium at UH instead of Halawa
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NOAA GLOBAL MONITORING LABORATORY VIA AP
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.
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