Via NY Times:

Chicago commuters have all the fun. Two weeks ago, there was the Heartland Institute’s Unabomber billboard likening a belief in climate change to psychopathy. This week, those stuck in traffic missed out on one larger-than-life retort to the Heartland campaign but will get to view another.

Forecast the Facts, a campaign devoted to accuracy and integrity in weather monitoring, had hoped to advertise in the exact same spot in an ironic format mimicking the Heartland ad. The Heartland billboard had depicted Theodore J. Kaczynski, who killed three people and wounded 23 with mail bombs, alongside the red-lettered words: “I still believe in climate change. Do you?”

Forecast the Facts, which is seeking to persuade corporations to end their donations to Heartland, would have presented the Pfizer pharmaceutical company’s logo alongside similarly imposing red letters reading: “We still support Climate Deniers. Do you?” Just below, Pfizer’s 2010 donation to the Heartland Institute, which a document circulated this spring put at $130,000, would be shown in small white print. […]

Rather than a reprimand of Pfizer, Chicago drivers will be treated to a less tongue-in-cheek but pointed billboard sponsored by Al Gore’s Climate Reality Project. In more soothing shades of earthy green, it asks: “Who to believe on climate? Heartland. . . or EVERY National Scientific Academy in the world?”

“We really try to put things up that are appropriate,” Mr. Cullinan said.

Maggie L. Fox, chief executive of the Climate Reality Project, described the group’s billboard response as “a small reminder of who is really on the fringe.”