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For those who missed it: CO2 levels hit 403ppm in 2016.
https://www.scientificamerican.com/article/carbon-dioxide-levels-grew-at-record-pace-in-2016/
Generation of CO2 was flat, but still at high levels; the most likely reason for the boost is the side effects of the 2016 El Nino. Plus, forests -- which normally act like carbon sinks -- are rapidly becoming carbon sources as we chop them down and burn the wood.
This is a CO2 level the planet hasn't hit in 3 to 5 million years. During that period, the atmosphere was 2-3C hotter, and sea levels were 10-20 meters higher. We should also note that it took thousands of years for CO2 levels to rise to that level during the Pliocene era, whereas the recent run-up took only a few decades. Meaning that yes, we have yet to see the full effects of such high levels of CO2.
https://www.scientificamerican.com/article/carbon-dioxide-levels-grew-at-record-pace-in-2016/
Generation of CO2 was flat, but still at high levels; the most likely reason for the boost is the side effects of the 2016 El Nino. Plus, forests -- which normally act like carbon sinks -- are rapidly becoming carbon sources as we chop them down and burn the wood.
This is a CO2 level the planet hasn't hit in 3 to 5 million years. During that period, the atmosphere was 2-3C hotter, and sea levels were 10-20 meters higher. We should also note that it took thousands of years for CO2 levels to rise to that level during the Pliocene era, whereas the recent run-up took only a few decades. Meaning that yes, we have yet to see the full effects of such high levels of CO2.