Reuters: A coalition of U.S. states and Canadian provinces planning a cap-and-trade market to curb carbon emissions, can meet their environmental goals and reap modest cost savings, a study released on Wednesday said. The analysis by the Western Climate Initiative (WCI) said the effort to foster a clean-energy economy can significantly reduce emissions of the greenhouse gases linked to climate change and achieve about $100 billion in net savings by 2010. California, British Columbia and …