"There is still zero empirical evidence that anthropogenic production of carbon dioxide is making any measurable contribution to the world's present warming trend." -- Alexander "Ace" Cockburn in The Nation
LINK and LINK
Wow! Left wing pundit Alexander Cockburn uses ONE source, a retired combustion research scientist, to in Cockburn's mind completely debunk all of the thousands of scientists all over the world and all of the masses of data that they have laboriously collected and analyzed over decades. What a wonderful bedfellow to folks on the right like Senator Inhofe who with identical logic think a science fiction writer like Crichton and a smattering of other self-proclaimed experts are sufficient to counter the entirety of the scientific community. Both Cockburn and Inhofe are so boldly ludicrous, so extreme and fringe in their views, and so vacant in their arguments that some people probably think, "Well if they're THAT bold, maybe there's something to it. Because after all, people of such prominence couldn't just be completely deluded, could they?" Answer: YES.
If anyone wants to a summary of the scientific consensus, there's a comprehensive overview at Real Climate (LINK) and also a more simplified version (LINK). It's not science fiction but perhaps Cockburn will be able to make sense of it nevertheless.
(Cockburn's articles and responses to these articles are on ZNet. LINK)