File:Mauna Loa Observatory CO2 - April 2021 - New record high.jpg

Mauna Loa Observatory CO2 - April 2021 - New record high

"For the first time in recorded history, the concentration of atmospheric carbon dioxide, or CO2, was measured at more than 420 parts per million at the Mauna Loa Observatory on the Big Island of Hawaii."

• https://research.noaa.gov/article/ArtMID/587/ArticleID/2636/Rise-of-carbon-dioxide-unabated

* https://www.esrl.noaa.gov/gmd/ccgg/trends/monthly.html

* https://www.esrl.noaa.gov/gmd/ccgg/trends/weekly.html

* https://www.esrl.noaa.gov/gmd/ccgg/trends/

• https://eandt.theiet.org/content/articles/2021/04/atmospheric-carbon-dioxide-rises-to-highest-recorded-levels/

• https://www.theguardian.com/environment/2021/apr/07/carbon-dioxide-levels-in-atmosphere-reach-record-high

• https://www.washingtonpost.com/weather/2021/04/05/atmospheric-co2-concentration-record/

* https://www.crediblecarbon.com/news-and-info/news/carbon-dioxide-is-halfway-to-doubling-pre-industrial-levels-the-washington-post/

• https://www.metoffice.gov.uk/research/climate/seasonal-to-decadal/long-range/forecasts/co2-forecast

• https://sputniknews.com/science/202104061082551685-global-co2-levels-hit-record-high-reports-say/

• https://www.newsweek.com/co2-earth-record-high-mauna-lao-observatory-914863

• https://earther.gizmodo.com/carbon-dioxide-reached-a-new-high-in-humanitys-existenc-1841175734

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