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Arctic Warming Up - in 1955 - Reports Chicago Tribune



September 14, 2020 - In 1955, atmospheric CO2 was at 314 ppm. That’s about a 100 ppm CO2 ago — and 36 ppm CO2 below the James Hansen-claimed ideal CO2 level of 350 ppm. (Note NYTimes update at end of post.)



Other points made in the Chicago Tribune article:




All this just in time for today’s NYTimes report — Yes, things are always changing in the Arctic!