And what do all those tests show? There used to be less co2 at some points in the fairly immediate past? And...? They also show there was more ice, oh wait, less ice, oh wait, then more ice, and oh yeah, less ice. The earth became a big ball of frozen methane, and all life ended. No? The earth had so little co2 in it, and so much oxygen, that it burned to a cinder, ended all oxidation, and all life ended. There used to be bigger reptiles than there are now. Less plant life. More plant life. More methane. Less methane. Why? How? What was the effect? What will be the effect? Doesn't matter, as long as somebody does something. What's the solution? You have no idea, but better to panic anyway.
It's true I cannot disprove a negative. You got me there. So keep on with your science fiction. Keep donating other people's money to failing green companies. It's not science, but it's all you have.
Talk about willful ignorance.