What does 400 ppm look like? — Carbon Visuals
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400 parts per million. Why is the figure in the news? Can we help people make 400 ppm meaningful for themselves by showing what it looks like?
Daily CO2
2013 State of the Climate: Carbon dioxide tops 400 ppm
Human activities have dramatically increased atmospheric CO2 levels, causing imbalances in the global carbon cycle – Climate Feedback
What does 400 ppm look like? — Carbon Visuals
Arctic News: Monthly CO₂ not under 400 ppm in 2016
Zack Labe on X: Carbon dioxide (CO₂) averaged 418.2 ppm in January 2022. 10 years ago January averaged ~393.3 ppm. + Data (@NOAA_ESRL): / X
Atmospheric CO2 concentration - s-Ink · accessible science graphics
Climate Tipping Point? Concentration of Carbon Dioxide Tops 400 ppm For First Time in Human History
We won't ever see a month below 400ppm,' said NASA's chief climate scientist
World's carbon dioxide concentration teetering on the point of no return, Climate crisis
392 parts per million
How the World Passed a Carbon Threshold and Why It Matters - Yale E360
