Score one more for the corporate responsibility crowd: Pacific Gas & Electric has up and left the U.S. Chamber of Commerce, citing “irreconcilable differences” with the business lobby’s climate policy.

Last week, when the Chamber of Commerce announced it would petition the EPA to hold a "Scopes Monkey Trial" on the science behind global warming, we wondered whether some of the Chamber’s more climate-friendly members might protest.

Back in June, during the House debate over climate legislation, three Democratic swing votes—Reps. Kathy Dahlkemper, Chris Carney, and Tom Perriello—all received letters that appeared to be from local organizations opposing the bill. Perriello got multiple letters from the local NAACP in Virginia, urging him to vote no. Dahlkemper and Carney both got letters from local senior citizens’ centers in Pennsylvania, all of which professed deep concerns about the bill’s effect on their electricity bills.