Wait, so in his book, Bill Bryson casually overstated the natural CO2 output by a factor of a thousand? I have to wonder how such a massive mistake got through

Wait, so in his book, Bill Bryson casually overstated the natural CO2 output by a factor of a thousand? I have to wonder how such a massive mistake got through the editing process. It's not even a simple typo, it's the lynchpin of Bryson's argument that humans contribute a negligible fraction of total atmospheric CO2.