I see the Wall Street Journal Article (News Corp. what a surprise) thinks that by repeating this:
WSJ wrote:The fact is that CO2 is not a pollutant. CO2 is a colorless and odorless gas, exhaled at high concentrations by each of us, and a key component of the biosphere's life cycle. Plants do so much better with more CO2 that greenhouse operators often increase the CO2 concentrations by factors of three or four to get better growth.
they will convince us that since Co2 is colourless and odourless and plants love it then it can't be causing warming.
Why do deniers insist on repeating this crap if not to misdirect the debate?
Then there's this:
Claude Allegre (former director of the Institute for the Study of the Earth, University of Paris) has been caught both misrepresenting and making up data and has, from what I can tell, lost all credibility as a scientist within the scientific community. He’s also a very old white man.
The WSJ (News Corp) article is starting to loose credibility already didn't take long.
There's plenty more here
with links to the referenced sources.