Nice graphs! Please explain why the separation in the top graph around 1980? This is around the same time the auto industry implemented catalytic converters to protect the environment. My guess is it coincides with the industrial development in China. I am sure they are concerned with the environment
. I also think natural events like wildfires in the US releasing carbon (and there have been several in recent years) as well as other events around the world.
I am just stating my opinion, right or wrong, I never claimed to know it all. Something else is at work, I don't know what it is, but blaming us (humans) can make guys like Al Gore tons of money and money is the root of all evil. My qualifications are I just a regular guy with two eye's and believe what I see, not what I hear or read from the media.