The U.S. Chamber of Commerce has been one of the loudest opponents of the American Clean Energy and Security Act — in spite of the objections of some of its members. Now one of those members has decided the rift is too big to ignore. PG&E just announced that it has dropped out of the Chamber because of "fundamental differences" over climate change.

According to a PG&E blog:

• In a letter, PG&E Chairman and CEO Peter Darbee criticized the Chamber for taking an extreme position on climate change, which Darbee said does not represent the range of views among Chamber members.
• Darbee took the Chamber to task for its recent demand that there be a "Scopes monkey trial of the 21st century" to challenge the science on climate change.
• Darbee said, "We find it dismaying that the Chamber neglects the indisputable fact that a decisive majority of experts have said the data on global warming are compelling and point to a threat that cannot be ignored."

Other companies, including Nike and Johnson & Johnson, have also criticized the Chamber for its reactionary stance on climate change.

PG&E, like EDF, is a member of USCAP — a group of corporations and environmental advocacy groups that are supporting a cap on carbon pollution.