House Energy and Commerce Chairman Henry Waxman (D-Calif.) announced Monday that his committee will hold four days of hearings this week on long-awaited global warming legislation.The full committee will meet on Tuesday and Wednesday. Then, on Thursday and Friday, Energy and Environment Subcommittee Chairman Ed Markey (D-Mass.) will oversee hearings in his subcommittee.A mix of private and nonprofit stakeholders is slated to testify at the hearings, which will address topics ranging from green jobs to U.S. competitiveness to grid modernization.Highlights include Tuesday appearances from Environmental Protection Agency Administrator Lisa Jackson, Transportation Secretary Ray LaHood and Energy Secretary Steven Chu. On Friday, former Vice President Al Gore and former Sen. John Warner (R-Va.) will discuss bipartisan leaders’ views on the legislation.