The Keeling Curve at 60: A Portrait of Climate Crisis
What the Keeling Curve shows, then, are two separate but connected rifts in Earth’s metabolism. First, an increase in total CO2 that breaks with at least 800,000 years of history. Second, increased CO2 is changing the way that plants absorb and emit CO2, and that in turn is altering a seasonal cycle that has likely been unchanged for hundreds of millions of years.


