Atmospheric levels of global CO2 exceed 400 ppm at the Mauna Loa recording station, making it the highest greenhouse gas concentrations in 800,000 to 15 million years.
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Atmospheric levels of global CO2 exceed 400 ppm at the Mauna Loa recording station, making it the highest greenhouse gas concentrations in 800,000 to 15 million years.
Atmospheric levels of global CO2 exceed 400 ppm at the Mauna Loa recording station, making it the highest greenhouse gas concentrations in 800,000 to 15 million years.