So at last, and after only seven requests, we have some references. And, to no gasps of surprise, they reveal that the "papers" on which Alexander Cockburn bases his claim that carbon dioxide doesn't cause global warming have not been published in peer-reviewed scientific journals. In fact they have not been published at all.
Cockburn appears not to understand the implications of this. Aware that I might as well argue with a tree stump, let me explain - again and for the last time - what it means. If these papers have not been published in peer-reviewed scientific journals, they are not science. They carry no more scientific weight than an article in the National Enquirer.
The man who wrote them, Martin Hertzberg, has kindly sent me copies. The howling scientific errors Cockburn makes do indeed stem from this work. (They are demolished here: http://www.realclimate.org/index.php/archives/2007/05/this-week/). This is why the peer-review process exists: to weed out nonsense. Hertzberg informs me that he has tried to get his "papers" published in scientific journals, but he has failed: his nonsense has been weeded out. It is our misfortune that Alexander Cockburn does not understand this.