The United States Climate Action Partnership, the group of corporations calling “on the federal government to quickly enact strong national legislation to require significant reductions of greenhouse gas emissions,” just doubled in size (PDF):

With its new members, USCAP companies now have total revenues of $1.7 trillion, a collective workforce of more than 2 million and operations in all 50 states; they also have a combine market capitalization of more than $1.9 trillion.

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The big news is that General Motors has joined the list:

GM is very pleased to join USCAP to proactively address the concerns posed by climate change and applauds its members for recognizing the important role that technology can play in achieving an economy-wide solution,” said Rick Wagoner, chairman and CEO of General Motors. “A central element as we see it is energy diversity — being able to offer consumers vehicles that can be powered by many different energy sources and advanced propulsion systems to help displace petroleum and reduce greenhouse gas emissions.

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Other new members include Alcan, Boston Scientific, ConocoPhillips, Deere & Company, The Dow Chemical Company, Johnson & Johnson, Marsh, PepsiCo, Shell, and Siemens, along with The Nature Conservancy and the National Wildlife Federation.