Interesting weather fact.

A simple question: what caused previous ice ages and subsequent warming before man arrived?

Not even remotely a simple question and absolutely nothing to do with what is happening today. Thousands or millions or even hundreds of years ago man was not burning fossil fuels to power electric generators or motor vehicles of every type imaginable. What happened previously is irrelevant to what is happening today. There is no simple answer. It is not a simple question. Never before has what is happening now happened because never before has man had such a hand in it. There is no comparison of what happened before to what is happening now. How is this not obvious to even the most casual observer? Or are not not observing. Science provides facts. This not some wild theory. Where do you think all the stuff we are spewing goes and what do you think it does? Do you really think anything like it has ever happened before? Explain when and how. Do you really think someone is making all of this up like some movie plot? I would agree that it has certainly been presented poorly but that does not mean it is not true. The air is full of it in measurable amounts. No one is making this up. Why is it so difficult to comprehend. Denial? Maybe if we ignore it it will go away? Seriously? Do you really think what happened before has anything to do with today? Where have you been?