briansue wrote:
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?
Say Global warming is a fact.  How do you connect that fact to carbon taxes?  Where is the linkage between cooler temperatures or alternative energy solutions and higher taxes.  Maybe higher taxation leads to businesses and individuals to choose cheaper, more carbon emitting methods of production and consumption.   
A case history to study is the Irish potato famine.  There were crop failures of potatoes.  Prices rose, as those prices rose, the demand for potatoes actually increased, setting off a cycle that eventually led to famine.  The reason demand rose despite higher prices was alternative foods were even more expensive than potatoes.  Hence after buying potatoes the people had even less money for those alternatives and instead demanded more potatoes, which was the only thing they could afford.  Lack of demand for the other foodstuffs forced those farmers to try and raise potatoes, since that was the only thing that could sell.  Those potato crops failed and "bingo" there were no foodstuffs at all.  
Maybe the same thing will happen with carbon taxes.  Disposable income will decrease due to higher taxes.  People and businesses won't be able to risk or afford to buy new technology.  Therefore the demand for the new technology won't exist, so it won't be invented and implemented.  There is a reason Tesla cars are $100,000 plus.  For that type of technology to become mainstream it first requires the high end customer to adopt it.  Ditto big screen TVs, Computers, Cell Phones etc.  They all needed the high end consumer to jump start the businesses.  Raise taxes and alternative energy might lose that Jump start.