| Jul. 23, 2021 | 416.08 ppm |
| Jul. 23, 2020 | 413.55 ppm |
| 1 Year Change | 2.53 ppm (0.61%) |
Last CO2 Earth update: 2:35:02 AM on Jul. 24, 2021, Hawaii local time (UTC -10)
This table presents the most up-to-date, daily average reading for atmospheric CO2 on the planet. Units = parts per million (ppm). Measurement location = Mauna Loa Observatory, Hawaii. Source = NOAA-ESRL.
https://www.co2.earth/daily-co2
