Quote:
Originally Posted by powderjunkie
I nominate The Fonz as our spokesperson to set Greta straight
The ~9800 years preceding the last 200 years showed a gentle increase from about 265ppm to ~280ppm.
Around 1912, atmospheric CO2 levels breached the 300 ppm threshold for the first time in at least 2.1 million years. In the last few years we've broken through 400ppm!
Dry air is still composed of roughly 78.09% nitrogen, 20.95% oxygen, 0.93% argon, and 0.04% carbon dioxide...messing with the hundreths of decimal points is obviously no big deal because we have so much air...
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When you consider the massive increase in human population as well as the increased levels of industrialization over the last 100 years a 0.01% raise in CO2 levels is actually pretty sensible. I'm actually surprised it's not higher as going from 200 million to 7.5 billion people was always going to affect the environment in a negative manner.