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  • Earth's atmosphere hasn't had this much CO2 in millions of years

    06/05/2025 2:49:02 PM PDT · by PROCON · 87 replies
    nbcnews.com ^ | June 5, 2025 | By Denise Chow and Chase Cain
    New data shows that CO2 levels have broken through 430 parts per million, an indication that human-caused global warming will continue to warp the environment.Earth’s atmosphere now has more carbon dioxide in it than it has in millions — and possibly tens of millions — of years, according to data released Thursday by the National Oceanic and Atmospheric Administration and scientists at the University of California San Diego.For the first time, global average concentrations of carbon dioxide, a greenhouse gas emitted as a byproduct of burning fossil fuels, exceeded 430 parts per million (ppm) in May. The new readings were...