In May 1972 the monthly average concentration of carbon dioxide measured at Mauna Loa, Hawaii, reached 330.1 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 May 1972.
Before and after
- 16 April 1972Launch of Apollo 16
- 16 April 1972Death of Yasunari Kawabata
- 17 April 1972Birth of Jennifer Garner
- 27 April 1972Death of Kwame Nkrumah
- May 1972Carbon dioxide passes 330 ppm at Mauna Loa
- 2 May 1972Birth of Dwayne Johnson
- 16 May 1972Birth of Andrzej Duda
- 25 May 1972Construction of Parc des Princes
- 26 May 1972Construction of Munich Olympic Stadium
More in Earth & climate
The era
This moment belongs to the Contemporary world (1945 CE to today), the world since 1945. You can also browse everything in the 20th century.