Atmospheric CO2 Concentration
Annual average CO2 at Mauna Loa Observatory (parts per million). Data from NOAA/ESRL.
| Year | CO2 (ppm) | Change |
|---|---|---|
| 1960 | 316.9 | +0.0 |
| 1970 | 325.7 | +8.8 |
| 1980 | 338.8 | +13.1 |
| 1990 | 354.4 | +15.6 |
| 2000 | 369.6 | +15.2 |
| 2005 | 379.8 | +10.2 |
| 2010 | 389.9 | +10.1 |
| 2015 | 400.8 | +10.9 |
| 2016 | 404.2 | +3.4 |
| 2017 | 406.5 | +2.3 |
| 2018 | 408.5 | +2.0 |
| 2019 | 411.4 | +2.9 |
| 2020 | 414.2 | +2.8 |
| 2021 | 416.4 | +2.2 |
| 2022 | 418.6 | +2.2 |
| 2023 | 421.1 | +2.5 |
| 2024 | 424.6 | +3.5 |