Those fearful about man-made global warming want to see stricter government regulations on carbon to stave off climate catastrophe.  But according to the Center for the Study of Science, carbon dioxide emissions in the U.S. from energy production and use have been declining since 2005, and dropped by nearly 4% between 2011 and 2012 even as economic output increased by more than 2%.  The reason?  Not strict government regulations, but rather, good old market economics that saw a large switch from coal to natural gas for electricity.  There’s growing questions about whether there is any climate danger whatsoever from coal and CO2, but for those who are worried about it, this shows that the market, rather than the government, is still the best way to achieve results.