In May 2013 the monthly average concentration of carbon dioxide measured at Mauna Loa, Hawaii, reached 400.0 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 2013.
Before and after
- 8 April 2013Death of Margaret Thatcher
- 15 April 2013Boston Marathon bombings
- May 2013Discovery of Kepler-62 f
- May 2013Discovery of Happisburgh footprints
- May 2013Carbon dioxide passes 400 ppm at Mauna Loa
- 28 May 2013Gezi Park protests
- 1 July 2013Discovery of Hippocamp
- 3 July 20132013 Egyptian coup d'état
- 9 July 2013Release of Dota 2
More in Earth & climate
- 6 December 1947Establishment of Everglades National Park
- 5 June 1981The first cases of AIDS are reported
- 20032003 European heat wave
- 2005Hurricane Katrina
- from 3 November 2013 to 11 November 2013Typhoon Haiyan
- 25 April 2015April 2015 Nepal 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.