San Jose Mercury News: A historic, comprehensive energy bill — the first to tackle climate change by reducing carbon emissions — won approval from a major House committee Thursday, setting the stage for a national debate on a plan to gradually wean the U.S. economy from fossil fuels. The centerpiece of the plan is a cap-and-trade system that caps greenhouse gas emissions from every source, with tighter limits each year. The bill establishes a carbon market, with polluters buying and selling emissions …