FILE - A man wades into the ocean at sunset on June 22, 2021, in Newport Beach, Calif. The National Oceanic and Atmospheric Administration announced Friday, June 3, 2022, that the amount of carbon dioxide in the atmosphere in May averaged 421 parts per million, more than 50% higher than pre-industrial levels. The NOAA said carbon dioxide levels in the air in May have reached a point last known when Earth was 7 degrees hotter, millions of years ago. (AP Photo/Jae C. Hong, File)
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