In April 2022 the monthly average concentration of carbon dioxide measured at Mauna Loa, Hawaii, reached 420.2 parts per million for the first time. Before the Industrial Revolution the air held about 280 ppm, a level that ice cores show had not been exceeded for hundreds of thousands of years. The NOAA record shows the concentration climbing a little faster almost every decade. It took place in April 2022.
Before and after
- from 24 March 2022 to 1 December 20222022 Peruvian protests
- 27 March 2022Democratic Republic of the Congo–Rwanda conflict
- 27 March 2022M23 campaign
- 31 March 2022Bucha massacre
- April 2022Carbon dioxide passes 420 ppm at Mauna Loa
- 3 April 20222022 Hungarian LGBTQ rights referendum
- 8 April 2022Kramatorsk railway station attack
- 10 April 20222022 French presidential election
- 18 April 2022Battle of Donbas
More in Earth & climate
- 6 December 1947Establishment of Everglades National Park
- 8 April 1949Establishment of Plitvice Lakes National Park
- 1980Establishment of Komodo National Park
- 20032003 European heat wave
- from 3 November 2013 to 11 November 2013Typhoon Haiyan
- 8 September 20232023 Marrakesh-Safi earthquake
The era
This moment belongs to the Contemporary world (1945 CE to today), the world since 1945. You can also browse everything in the 21st century.