Inter Press Service: As countries failed to reach a substantive climate change pact at Copenhagen last week, action at the subnational level has emerged as one of the likeliest paths toward significant climate action. The U.S. state of California – always a trend-setter and the largest regional economy of the largest national economy – may have some templates for action that circumvents both Copenhagen and Washington. When Gov. Arnold Schwarzenegger showed up in Denmark on Tuesday, then, it was not …