ABC agenda Sir David getting all nazi like, page-124

"Climate alarmists contend that the degree of global warmth over latter part of the 20th century was greater than it has been at any other time over the past one to two millennia. Why? Because this contention helps them sell their claim that the "unprecedented" temperatures of the past few decades were CO2-induced. Hence, they cannot stomach the thought that the Medieval Warm Period of a thousand years ago could have been just as warm as, or even warmer than, it has been recently, especially since there was so much less CO2 in the air a thousand years ago than there is now. Likewise, they are equally loath to admit that the temperatures of the Roman Warm Period of two thousand years ago may also have rivaled, or exceeded, those of the recent past, since atmospheric CO2 concentrations at that still earlier time were also much lower than they are today. "

http://www.co2science.org/subject/r/summaries/rwpeurope.php