Bloomberg: A U.S. law to curb carbon emissions would spur billions of dollars of spending on green-energy projects in developing countries, billionaire George Soros said. “If you had the legislation in the United States you would have a market” for carbon emissions and for offsetting credits provided to clean-energy projects in the developing world, Soros said at a conference yesterday in New York. “Right now you don’t even have that. The United States is the laggard.” Without a cap on …