How is it misleading? Unless you accept that manmade CO2 is responsible for global warming, there is no reason to curb it.
The statement on the website is a sop to the (absurd) "precautionary principle". The website also emphasizes the "uncertainty" as to what is causing global warming. Thompson has not endorsed any specific measures to do anything about it, and when I asked him a rather loaded question about it myself last week he came across as very skeptical about the whole thing.
I would rather he not even have what he does on the website, but it's a whole lot better than Huckabee's buying wholesale into the anti-human Stalinist Cult of Al Gore and calling for "cap & trade". Same goes for the idiot McCain.