Bloomberg: The U.S. House began debating legislation to limit greenhouse-gas emissions as lawmakers remained divided and Democratic leaders tried to rally support. “We’re not there yet,” House Majority Whip Jim Clyburn of South Carolina said before the debate began. Several lawmakers reported receiving numerous phone calls yesterday and today, urging them to vote for or against the plan. “The need to act is clear and urgent,” Energy and Commerce Committee Chairman Henry Waxman said in …