Earth’s Atmosphere Contains More CO2 Than It Has in Millions of Years

EcoWatch
By Cristen Hemingway JaynesJun 6, 2025, 9:35 pm375 ptsTop
For the first time in millions of years, Earth’s atmosphere contained an average of 430.2 parts per million (ppm) of carbon dioxide, the result of humans burning fossil fuels. The number, recorded in May at the National Oceanic and Atmospheric Administration (NOAA)’s Mauna Loa Observatory in Hawaii by…

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