That’s a direct quote from Minnesota’s own Powerline Blog, and I don’t think they were aware of the irony. I think they think they were referring to this chart, which demonstrates the correlation between CO2 levels and global temperature change over the last century or so.
Thats actually good chart design: axes are appropriate, a lot of data is packed into it very cleanly, and you can see the relationships clearly. Powerline doesn’t like that.
Looks pretty persuasive, doesn’t it? The casual observer would think that we are looking at record levels of CO2–which is not a pollutant, but rather makes like on Earth possible–and record high temperatures. How can anyone dispute the causal connection?