Agence France-Presse: Congress will pass legislation to stem global warming by year’s end, House Speaker Nancy Pelosi vowed Tuesday, as hearings got underway on a bill to reduce US greenhouse gas emissions. “We will pass legislation this year,” Pelosi told reporters. “On Earth Day next year, we will celebrate the progress we’ve made,” the House leader declared. Her remarks came as Congress began examining a draft bill for clean energy development that aims to cut US carbon emissions by 20 …