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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?
Climate Change Indicators: Atmospheric Concentrations of Greenhouse Gases
June's global average concentration of atmospheric carbon dioxide (#CO₂) was about 419 parts per million (ppm), a roughly 50% increase since 1750 due to human activities, such as burning fossil fuels and
What Earth was like last time CO2 levels were as high as today
How the World Passed a Carbon Threshold and Why It Matters - Yale E360
Carbon Monoxide Levels Chart
400 ppm and counting – Shell Climate Change
University of Oxford - The global average of carbon dioxide in the atmosphere, measured in parts per million (ppm). 📈, Our World In Data #TruePlanet #COP26Glasgow #COP26
We just breached the 410 ppm threshold for carbon dioxide -- the highest it's been since the mid-Pliocene
CO2 Levels Break Another Record, Exceeding 411 Parts Per Million - Yale E360
Climate Change: Atmospheric Carbon Dioxide
Visualizing Climate Change – Ecotone
We won't ever see a month below 400ppm,' said NASA's chief climate scientist
February carbon dioxide levels average 400ppm for first time