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NOAA : Carbon Dioxide in Atmosphere Reaches Highest Level in Millions of Years
Despite Trump-Musk Feud, CO2 Milestone Is the 'Important News of the Day'
By Olivia Rosane
Carbon dioxide levels usually peak in May, but 2025's reading was like no other
By Dinah Voyles Pulver
Atmospheric carbon dioxide levels break seasonal records: NOAA
By Sharon Udasin
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Earth's atmosphere hasn't had this much CO2 in millions of years
By Denise Chow & Chase Cain
Research shows Earth's carbon dioxide levels are at highest in over 30 million years | SD News Daily
Earth’s Atmosphere Contains More CO2 Than It Has in Millions of Years
By Cristen Hemingway Jaynes
Atmospheric CO₂ hits record levels—A stark warning from Mauna Loa
By Pranjal Amit Malewar
Earth's CO2 hits highest recorded level in human history - exceeding 430 parts per million for the first time
By Jonathan Chadwick
CO2 levels just broke another record. Here's what that means
By Bridget Stringer-holden