14 Jun 2005 - "City officials are not sitting idly by...
The Chicago Climate Exchange is a success and model.
Jason Margolis. "My Kind of Down Chicago Climate Exchange paves the way for U.S. emissions trading". 14 Jun 2005 - "City officials are not sitting idly by waiting to see if or when such things could happen. This spring, Oakland became the second U.S. municipality to join the Chicago Climate Exchange (CCX) -- North America's first and only voluntary, but legally binding, emissions-trading market.