Explain a few things here. What planet is not "bipolar"? Since the answer to that rhetorical query is "none", why do you keep making note of it?
Why do you describe the Earth as "glaciated"? I've traveled quite a bit in my days. I have seen precisely one glacier with my own two eyes and it was about two acres in size. The world doesn't look "glaciated" to me. And NSIDC tells us that the world's glaciers actually make up only 0.14% of the Earth's surface. Do you actually think "glaciated is an accurate description? And, finally, what do you actually mean when you say that "variations are a hallmark..."? Variations in what? And if you could quantitatively characterize "hallmark" (AND THEN NEVER SAY THE GODDAMNED FUCKING WORD EVER AGAIN), it would really enable a more informed discussion.
You haven't the faintest idea how dominant I believe it to be. Neither of us know what the other is thinking. We can only guess, without asking questions. That's why I often ask you to explain things you've said, as I just did. The problem, of course, is that you almost never answer and we are left to wonder if that is because you won't or you can't. So here is the point where a normal person would ASK me how dominant I believe CO2 to be. A normal person would ASK me if I can explain why mainstream science doesn't look at those data and come to the same conclusions you do. But you don't. You assume you know my answer and then attack that. That, of course, tells me and all your loyal readers here more about you than you probably wanted.
I've asked you this before but... seeing that this is your favorite topic and that you've studied it for ages and you're really done your work here: WHY HAS THE PLANET BEEN COOLING FOR THE LAST 500 MILLION YEARS?