BZZZT!
Sorry.
Thanks so much for playing, but that is incorrect.
If you Google "effect of CO2 on climate change" (with the quote marks), you get exactly 8 hits, one of which is this article in the Concord paper.
If you Google "effect of CO2 on climate change" (WITHOUT the quote marks), you get 20,500,000 hits, but those include every page anywher with the word "effect" -OR- the word "CO2" -OR- the word "climate" -OR- the word "change".
This idiot doesn't even know how to google.
And the very first link is a Global Warming Swindle article.