Carbon dioxide levels in atmosphere hit record high in May: Monthly average surpassed 414 ppm at NOAA’s Mauna Loa Observatory in Hawaii — ScienceDaily

Atmospheric carbon dioxide continued its rapid rise in 2019, with the average for May peaking at 414.7 parts per million (ppm) at NOAA’s Mauna Loa Atmospheric Baseline Observatory.

Source: Carbon dioxide levels in atmosphere hit record high in May: Monthly average surpassed 414 ppm at NOAA’s Mauna Loa Observatory in Hawaii — ScienceDaily