Reuters: U.S. venture capitalists say they see a bright spot amid the international economic gloom: a potential trillion-dollar market in carbon spurred by new regulations and a growing awareness of climate change. The growth areas are less in traditional “green” businesses like solar panels and windmills and more in new infrastructure, such as a “smart” grid that would get alternative energy from where it’s generated to where the customers are, said Martin Whittaker of Mission Point Capital …