Starburst, re: the cause of warming prior to the 20th century. Is this Wikipedia chart agreeable to you? I am guessing not because it hasn't been doctored by Joanne Nova or The Lavoisier Group or the makers of the Great Global Warming Swindle...
...but in case you are in agreeance with the chart, warming starts to occur around 1850 or so, which, correct me if I am wrong, is soon after the industrial revolution started (late 1700's) and is therefore reasonably consistent with AGW. But I'm sure you have an alternative view that you wish to astound us with, so please go ahead.
