Back in March, we wrote about how to talk to Michael Crichton and his ilk. It seems almost impossible that there could be anyone left who denies that the Earth's climate is changing as a result of human activity. But amazingly enough, they do exist and they are extremely vocal: evidence the Competitive Enterprise Institute ads that we wrote about earlier this week.

Now WorldChanging, a blog we read regularly, has issued a call for help in dealing with these poor fools whose heads are in the sand (or somewhere less polite). Having noticed a rise in posted comments from "climate denialists," the folks at WorldChanging are calling for some groupthink. Here's what they're after: