Good that you admitted to the fact that climate change has been occurring for the last 4 billion years. As a scientist, it is not enough to just be contented with the status quo, especially when the end of it spells doom for the planet. Yes, it could have been occurring for a while, the current rate is the main bone of contention. We have far exceeded our carbon budget for this century and the implication is that we are depleting the planet at a much higher pace than naturally programmed.

I admit that my earlier comment might be a bit out of place, it is a kind of defense mechanism against several pseudoscientific ideologies that I have witnessed on this platform.

NB: You will have to be more subtle if you are so keen to know my age

Edit: I will take the subtle insult with a pinch of salt.