- Atmospheric CO2 reached 415.26 ppm on the Keeling Curve, the highest level since modern humans evolved. Measured each day since 1958, the curve is now so steep it no longer looks like a curve. https://www.inverse.com/article/55792-keeling-curve-hits-its-highest-point-to-date 40 comments science
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- Eric Holthaus on Twitter: "This is the first time in human history our planet's atmosphere has had more than 415ppm CO2. Not just in recorded history, not just since the invention of agriculture 10,000 years ago. Since before modern humans existed millions of years ago. We don't know a planet like this." / Twitter https://twitter.com/EricHolthaus/status/1127681719216353280 4 comments
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