Current Co2 Ppm 2024 Us. Atmospheric carbon dioxide could be 800 ppm or higher—conditions not seen on earth for close to 50 million years. The data contains concentrations of carbon dioxide in the atmosphere from hundreds of thousands of years ago through 2021, measured in parts per million (ppm).
This may, the concentration of co2 in the atmosphere hit nearly 427 parts per million, which is an increase of about 3 parts per million compared to last year’s peak. Scientists at scripps oceanography, which initiated the co 2 monitoring program known as the keeling curve at mauna loa in 1958 and maintains an independent record, calculated a may monthly average of 426.7.